in 2018 , u.s. gdp is expected to show solid growth of 3.0 % , according to the most recent estimate , led by tax cuts and corporate spending increases which drove an acceleration in growth through mid-2018 , ahead of gdp growth of 2.2 % in 2017 and 1.6 % in 2016. looking ahead to 2019 , economists have mixed views on the broader u.s. economy , with current estimates for u.s. real gdp growth indicating a rate of growth between 2 % and 3 % , despite the administration 's goal to raise the pace of expansion to 4 % per year through increased fiscal stimulus . meanwhile , the global environment 's rebound in economic activity that began in mid-2016 is expected to moderate somewhat from recent peak levels , influenced by international trade tensions , tightening financial conditions , and rising geopolitical uncertainty . as a result , 2019 gdp growth in world economies is expected to grow by approximately 3.5 % , below the 2018 growth rate of 3.7 % , according to the international monetary fund . this outlook is expected to be driven by a moderation in u.s. and european economic growth rates , as well as a flattening of growth in emerging market and developing economies . looking ahead to the next few years , we remain cautiously optimistic that our economically-sensitive commercial and industrial markets will improve based on normalized global conditions . defense we have a well-diversified portfolio of products and services that supply all branches of the u.s. military , with content on many high performance programs and platforms , as well as a growing international defense business . a significant portion of our defense business operations is attributed to the united states market , and characterized by long-term programs and contracts driven primarily by the department of defense ( dod ) budgets and funding levels . the u.s. defense budget serves as a leading indicator of our growth in the defense market . following across-the-board sequestration mandated by the bca , defense spending and related supplemental budgets bottomed in 2015. however , growth has stabilized in recent years , and in early 2018 , congress signed a bill to provide relief against the spending caps associated with the bca . further , a two-year budget agreement , signed in 2018 , paved the way for lawmakers to fund defense at $ 700 billion in fiscal year 2018 and $ 716 billion in fiscal year 2019 , both significant increases from the fiscal year 2017 budget . these growth rates are expected to provide the dod with additional stability and flexibility to enter into multi-year contracts without the impact of sequestration . in addition , the fiscal year 2019 defense appropriations bill , signed by the president in september 2018 , was the first to be signed into law on time in over a decade . looking ahead , the fiscal year 2020 budget is expected to range from $ 700 to $ 750 billion , with most reports indicating the likelihood of a $ 733 billion budget and continued growth in defense . we derive revenue from the naval defense , aerospace defense , and ground defense markets . in the naval defense market , we expect continued solid funding for the u.s. shipbuilding program , particularly as it relates to production on the ford class aircraft carrier , as well as the columbia class and virginia class submarine programs . we have a long legacy of providing products that support nuclear propulsion systems on naval vessels . in addition , through our service centers , we are a critical provider of ship repair and maintenance for the u.s. navy 's atlantic and pacific fleets . in the aerospace defense market , we expect to benefit from increased funding levels on command , control , communications , computers , intelligence , surveillance , and reconnaissance ( c4isr ) , electronic warfare , unmanned systems , and communications programs . as a leading supplier of cots and cots+ solutions , we continue to demonstrate that electronics technology will enhance our ability to design and develop future generations of advanced systems and products for high performance applications , while also meeting the military 's size , weight , and power considerations . we are also a leading designer and manufacturer of high-technology data acquisition and comprehensive flight test instrumentation systems . in the ground defense market , the modernization of the existing u.s. ground vehicle fleet is expected to recover slowly , while international demand should remain solid , particularly for our turret drive stabilization systems ( tdss ) . while we monitor the budget process as it relates to programs in which we participate , we can not predict the ultimate impact of future dod budgets , which tend to fluctuate year-by-year and program-by-program . commercial aerospace 22 curtiss-wright derives revenue from the global commercial aerospace market , principally to the commercial jet market , and to a lesser extent the regional jet and commercial helicopter markets . our primary focus in this market is oem products and services for commercial jets , which is highly dependent on new aircraft production from our primary customers - boeing and airbus . we provide a combination of flight control and utility actuation systems , sensors , and other sophisticated electronics , as well as shot and laser peening services utilized on highly stressed components of turbine engine fan blades , landing gear , and aircraft structures . steady growth in airline travel , along with the demand for and delivery of new aircraft to replace an aging fleet , continue to be key drivers in the commercial aerospace market . fiscal 2011 marked the beginning of a multi-year production up-cycle for the commercial aerospace market . story_separator_special_tag results by business segment commercial/industrial sales in the commercial/industrial segment are primarily generated from the general industrial and commercial aerospace markets and , to a lesser extent , the defense and power generation markets . the following tables summarize sales , operating income and margin , and new orders within the commercial/industrial segment . replace_table_token_11_th components of sales and operating income growth ( decrease ) : replace_table_token_12_th year ended december 31 , 2018 compared to year ended december 31 , 2017 sales increased $ 46 million , or 4 % , to $ 1,209 million , from the comparable prior year period . in the general industrial market , we experienced higher sales of $ 25 million , primarily due to increased demand for our industrial vehicle , industrial controls , and industrial valve products . sales in the naval defense market increased $ 9 million , primarily due to higher valve production 27 on the cvn-80 aircraft carrier program . aerospace defense sales increased $ 6 million , primarily due to higher sales of actuation systems on fighter jets . sales in the commercial aerospace market increased as higher sales of surface treatment services and sensors and controls products were partially offset by the timing of faa directive revenues . favorable foreign currency translation benefited sales $ 9 million . operating income increased $ 15 million , or 9 % , to $ 183 million , and operating margin increased 60 basis points to 15.1 % . the increase s in operating income and operating margin were primarily due to higher sales volumes and favorable overhead absorption for industrial vehicle and industrial valve products as well as the benefits of our ongoing margin improvement initiatives . new orders decreased $ 9 million as compared to the prior year , as higher demand for aerospace defense products and surface treatment services of $ 26 million and $ 18 million , respectively , was more than offset by the timing of commercial aerospace and naval defense orders of $ 33 million and $ 20 million , respectively . year ended december 31 , 2017 compared to year ended december 31 , 2016 sales increased $ 44 million , or 4 % , to $ 1,163 million , from the comparable prior year period . in the general industrial market , we experienced higher sales of $ 50 million , primarily due to increased demand for our industrial vehicle products . the commercial aerospace market benefited from higher sales of surface treatment services and actuation system products . these increases were partially offset by lower sales of $ 15 million in the naval defense market , primarily due to the timing of production on the virginia-class submarine program . operating income increased $ 12 million , or 8 % , to $ 168 million , and operating margin increased 50 basis points to 14.5 % . the increases in operating income and operating margin were primarily driven by ongoing margin improvement initiatives and higher sales volumes of our industrial vehicle products and surface treatment services . new orders increased $ 61 million as compared to the prior year , primarily due to growth in our industrial vehicle products of $ 56 million and higher demand of $ 30 million for both our actuation and sensors and controls products to the aerospace defense and naval defense markets . this increase was partially offset by a decline in naval valve new orders of $ 37 million due to the timing of funding . defense sales in the defense segment are primarily to the defense markets and , to a lesser extent , the commercial aerospace and the general industrial markets . the following tables summarize sales , operating income and margin , and new orders , within the defense segment . replace_table_token_13_th components of sales and operating income growth ( decrease ) : replace_table_token_14_th 28 year ended december 31 , 2018 compared to year ended december 31 , 2017 sales decreased $ 1 million , or less than 1 % , to $ 554 million , from the comparable prior year period , as higher sales in the aerospace defense market were more than offset by declines in the naval defense market . in the aerospace defense market , we experienced higher demand for embedded computing products and data acquisition and flight test equipment on fighter jet programs , partially offset by lower sales of embedded computing products supporting various uav programs . sales in the naval defense market decreased primarily due to lower submarine sales , while sales in the ground defense and commercial aerospace markets were essentially flat . operating income increased $ 19 million , or 17 % , to $ 128 million , compared with the same period in 2017 , while operating margin increased 350 basis points to 23.2 % . the increases in operating income and operating margin were primarily due to improved profitability as we moved beyond first year purchase accounting costs from our ttc acquisition , favorable contract adjustments within our naval defense business , and the benefits of our ongoing margin improvement initiatives . new orders decreased $ 16 million as compared to the prior year , primarily due to the timing of naval defense orders . year ended december 31 , 2017 compared to year ended december 31 , 2016 sales increased $ 89 million , or 19 % , to $ 555 million , from the comparable prior year period , primarily due to the incremental impact of our ttc acquisition , which contributed $ 65 million in sales . excluding the impact of ttc , sales to the aerospace defense , ground defense , and naval defense markets increased $ 9 million , $ 6 million , and $ 9 million , respectively , while sales to the commercial aerospace market were essentially flat . the increase in sales to the aerospace defense market was primarily due to increased uav production and

debt issuances there were no debt issuances in 2018 or 2017 . in 2018 , we made a discretionary $ 50 million prepayment on our 2013 notes . in 2017 , we fully repaid the $ 150 million 2005 senior notes that had matured . revolving credit agreement as of december 31 , 2018 , the corporation had no borrowings outstanding under the revolving credit agreement ( the credit agreement or credit facility ) and $ 22 million in letters of credit supported by the credit facility . the unused credit available under the credit agreement as of december 31 , 2018 was $ 478 million , which could be borrowed in full without violating any of our debt covenants . 32 repurchase of common stock during 2018 , the company repurchased approximately 1,700,000 shares of its common stock for $ 199 million . in 2017 , the company repurchased approximately 526,000 shares of its common stock for $ 52 million . dividends during 2018 and 2017 , the company made dividend payments of approximately $ 26 million and $ 25 million , respectively . year ended december 31 , 2017 compared to year ended december 31 , 2016 operating activities cash provided by operating activities decreased $ 34 million to $ 389 million during the year ended december 31 , 2017 , as compared to the prior year period . the decrease in cash provided by operating activities was primarily due to prior year collections related to the ap1000 china direct program of $ 102 million and a one-time $ 20 million benefit in the prior year as a result of the interest rate swap termination . this was partially offset by the timing of advanced collections of $ 48 million and higher cash earnings of $ 36 million during the current period .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```debt issuances there were no debt issuances in 2018 or 2017 . in 2018 , we made a discretionary $ 50 million prepayment on our 2013 notes . in 2017 , we fully repaid the $ 150 million 2005 senior notes that had matured . revolving credit agreement as of december 31 , 2018 , the corporation had no borrowings outstanding under the revolving credit agreement ( the credit agreement or credit facility ) and $ 22 million in letters of credit supported by the credit facility . the unused credit available under the credit agreement as of december 31 , 2018 was $ 478 million , which could be borrowed in full without violating any of our debt covenants . 32 repurchase of common stock during 2018 , the company repurchased approximately 1,700,000 shares of its common stock for $ 199 million . in 2017 , the company repurchased approximately 526,000 shares of its common stock for $ 52 million . dividends during 2018 and 2017 , the company made dividend payments of approximately $ 26 million and $ 25 million , respectively . year ended december 31 , 2017 compared to year ended december 31 , 2016 operating activities cash provided by operating activities decreased $ 34 million to $ 389 million during the year ended december 31 , 2017 , as compared to the prior year period . the decrease in cash provided by operating activities was primarily due to prior year collections related to the ap1000 china direct program of $ 102 million and a one-time $ 20 million benefit in the prior year as a result of the interest rate swap termination . this was partially offset by the timing of advanced collections of $ 48 million and higher cash earnings of $ 36 million during the current period .
```    
 Suspicious Activity Report : in 2018 , u.s. gdp is expected to show solid growth of 3.0 % , according to the most recent estimate , led by tax cuts and corporate spending increases which drove an acceleration in growth through mid-2018 , ahead of gdp growth of 2.2 % in 2017 and 1.6 % in 2016. looking ahead to 2019 , economists have mixed views on the broader u.s. economy , with current estimates for u.s. real gdp growth indicating a rate of growth between 2 % and 3 % , despite the administration 's goal to raise the pace of expansion to 4 % per year through increased fiscal stimulus . meanwhile , the global environment 's rebound in economic activity that began in mid-2016 is expected to moderate somewhat from recent peak levels , influenced by international trade tensions , tightening financial conditions , and rising geopolitical uncertainty . as a result , 2019 gdp growth in world economies is expected to grow by approximately 3.5 % , below the 2018 growth rate of 3.7 % , according to the international monetary fund . this outlook is expected to be driven by a moderation in u.s. and european economic growth rates , as well as a flattening of growth in emerging market and developing economies . looking ahead to the next few years , we remain cautiously optimistic that our economically-sensitive commercial and industrial markets will improve based on normalized global conditions . defense we have a well-diversified portfolio of products and services that supply all branches of the u.s. military , with content on many high performance programs and platforms , as well as a growing international defense business . a significant portion of our defense business operations is attributed to the united states market , and characterized by long-term programs and contracts driven primarily by the department of defense ( dod ) budgets and funding levels . the u.s. defense budget serves as a leading indicator of our growth in the defense market . following across-the-board sequestration mandated by the bca , defense spending and related supplemental budgets bottomed in 2015. however , growth has stabilized in recent years , and in early 2018 , congress signed a bill to provide relief against the spending caps associated with the bca . further , a two-year budget agreement , signed in 2018 , paved the way for lawmakers to fund defense at $ 700 billion in fiscal year 2018 and $ 716 billion in fiscal year 2019 , both significant increases from the fiscal year 2017 budget . these growth rates are expected to provide the dod with additional stability and flexibility to enter into multi-year contracts without the impact of sequestration . in addition , the fiscal year 2019 defense appropriations bill , signed by the president in september 2018 , was the first to be signed into law on time in over a decade . looking ahead , the fiscal year 2020 budget is expected to range from $ 700 to $ 750 billion , with most reports indicating the likelihood of a $ 733 billion budget and continued growth in defense . we derive revenue from the naval defense , aerospace defense , and ground defense markets . in the naval defense market , we expect continued solid funding for the u.s. shipbuilding program , particularly as it relates to production on the ford class aircraft carrier , as well as the columbia class and virginia class submarine programs . we have a long legacy of providing products that support nuclear propulsion systems on naval vessels . in addition , through our service centers , we are a critical provider of ship repair and maintenance for the u.s. navy 's atlantic and pacific fleets . in the aerospace defense market , we expect to benefit from increased funding levels on command , control , communications , computers , intelligence , surveillance , and reconnaissance ( c4isr ) , electronic warfare , unmanned systems , and communications programs . as a leading supplier of cots and cots+ solutions , we continue to demonstrate that electronics technology will enhance our ability to design and develop future generations of advanced systems and products for high performance applications , while also meeting the military 's size , weight , and power considerations . we are also a leading designer and manufacturer of high-technology data acquisition and comprehensive flight test instrumentation systems . in the ground defense market , the modernization of the existing u.s. ground vehicle fleet is expected to recover slowly , while international demand should remain solid , particularly for our turret drive stabilization systems ( tdss ) . while we monitor the budget process as it relates to programs in which we participate , we can not predict the ultimate impact of future dod budgets , which tend to fluctuate year-by-year and program-by-program . commercial aerospace 22 curtiss-wright derives revenue from the global commercial aerospace market , principally to the commercial jet market , and to a lesser extent the regional jet and commercial helicopter markets . our primary focus in this market is oem products and services for commercial jets , which is highly dependent on new aircraft production from our primary customers - boeing and airbus . we provide a combination of flight control and utility actuation systems , sensors , and other sophisticated electronics , as well as shot and laser peening services utilized on highly stressed components of turbine engine fan blades , landing gear , and aircraft structures . steady growth in airline travel , along with the demand for and delivery of new aircraft to replace an aging fleet , continue to be key drivers in the commercial aerospace market . fiscal 2011 marked the beginning of a multi-year production up-cycle for the commercial aerospace market . story_separator_special_tag results by business segment commercial/industrial sales in the commercial/industrial segment are primarily generated from the general industrial and commercial aerospace markets and , to a lesser extent , the defense and power generation markets . the following tables summarize sales , operating income and margin , and new orders within the commercial/industrial segment . replace_table_token_11_th components of sales and operating income growth ( decrease ) : replace_table_token_12_th year ended december 31 , 2018 compared to year ended december 31 , 2017 sales increased $ 46 million , or 4 % , to $ 1,209 million , from the comparable prior year period . in the general industrial market , we experienced higher sales of $ 25 million , primarily due to increased demand for our industrial vehicle , industrial controls , and industrial valve products . sales in the naval defense market increased $ 9 million , primarily due to higher valve production 27 on the cvn-80 aircraft carrier program . aerospace defense sales increased $ 6 million , primarily due to higher sales of actuation systems on fighter jets . sales in the commercial aerospace market increased as higher sales of surface treatment services and sensors and controls products were partially offset by the timing of faa directive revenues . favorable foreign currency translation benefited sales $ 9 million . operating income increased $ 15 million , or 9 % , to $ 183 million , and operating margin increased 60 basis points to 15.1 % . the increase s in operating income and operating margin were primarily due to higher sales volumes and favorable overhead absorption for industrial vehicle and industrial valve products as well as the benefits of our ongoing margin improvement initiatives . new orders decreased $ 9 million as compared to the prior year , as higher demand for aerospace defense products and surface treatment services of $ 26 million and $ 18 million , respectively , was more than offset by the timing of commercial aerospace and naval defense orders of $ 33 million and $ 20 million , respectively . year ended december 31 , 2017 compared to year ended december 31 , 2016 sales increased $ 44 million , or 4 % , to $ 1,163 million , from the comparable prior year period . in the general industrial market , we experienced higher sales of $ 50 million , primarily due to increased demand for our industrial vehicle products . the commercial aerospace market benefited from higher sales of surface treatment services and actuation system products . these increases were partially offset by lower sales of $ 15 million in the naval defense market , primarily due to the timing of production on the virginia-class submarine program . operating income increased $ 12 million , or 8 % , to $ 168 million , and operating margin increased 50 basis points to 14.5 % . the increases in operating income and operating margin were primarily driven by ongoing margin improvement initiatives and higher sales volumes of our industrial vehicle products and surface treatment services . new orders increased $ 61 million as compared to the prior year , primarily due to growth in our industrial vehicle products of $ 56 million and higher demand of $ 30 million for both our actuation and sensors and controls products to the aerospace defense and naval defense markets . this increase was partially offset by a decline in naval valve new orders of $ 37 million due to the timing of funding . defense sales in the defense segment are primarily to the defense markets and , to a lesser extent , the commercial aerospace and the general industrial markets . the following tables summarize sales , operating income and margin , and new orders , within the defense segment . replace_table_token_13_th components of sales and operating income growth ( decrease ) : replace_table_token_14_th 28 year ended december 31 , 2018 compared to year ended december 31 , 2017 sales decreased $ 1 million , or less than 1 % , to $ 554 million , from the comparable prior year period , as higher sales in the aerospace defense market were more than offset by declines in the naval defense market . in the aerospace defense market , we experienced higher demand for embedded computing products and data acquisition and flight test equipment on fighter jet programs , partially offset by lower sales of embedded computing products supporting various uav programs . sales in the naval defense market decreased primarily due to lower submarine sales , while sales in the ground defense and commercial aerospace markets were essentially flat . operating income increased $ 19 million , or 17 % , to $ 128 million , compared with the same period in 2017 , while operating margin increased 350 basis points to 23.2 % . the increases in operating income and operating margin were primarily due to improved profitability as we moved beyond first year purchase accounting costs from our ttc acquisition , favorable contract adjustments within our naval defense business , and the benefits of our ongoing margin improvement initiatives . new orders decreased $ 16 million as compared to the prior year , primarily due to the timing of naval defense orders . year ended december 31 , 2017 compared to year ended december 31 , 2016 sales increased $ 89 million , or 19 % , to $ 555 million , from the comparable prior year period , primarily due to the incremental impact of our ttc acquisition , which contributed $ 65 million in sales . excluding the impact of ttc , sales to the aerospace defense , ground defense , and naval defense markets increased $ 9 million , $ 6 million , and $ 9 million , respectively , while sales to the commercial aerospace market were essentially flat . the increase in sales to the aerospace defense market was primarily due to increased uav production and

