( 3 ) prior to september 2018 commercial production date the silvertip mine produced 0.2 million ounces of silver , 2.6 million pounds of zinc , and 1.8 million pounds of lead which are excluded from production numbers presented , unless otherwise noted . ( 4 ) prior to december 2018 commercial production date the jualin deposit at the kensington mine produced 8,208 ounces of gold which are excluded from the production numbers presented , unless otherwise noted . 36 consolidated financial results year ended december 31 , 2018 compared to year ended december 31 , 2017 revenue revenue decreased by $ 83.7 million as a result of fewer gold ( 15 % ) and silver ( 3 % ) ounces sold and an 8 % decrease in average realized silver prices , partially offset by an increase in average realized gold prices ( 1 % ) and sales from silvertip , which commenced commercial production in september 2018. the company sold 12.4 million silver ounces , 350,508 gold ounces , 4.4 million zinc pounds and 2.6 million lead pounds compared to 12.7 million silver ounces and 410,604 gold ounces in the prior year . gold contributed 68 % of sales , silver contributed 31 % , zinc contributed 1 % and lead contributed less than 1 % , compared to 70 % of sales from gold and 30 % from silver . costs applicable to sales costs applicable to sales remained comparable despite lower silver equivalent ounces sold due to a $ 26.7 million write-down of inventory at silvertip , higher costs applicable to sales per gold ounce at wharf and kensington , partially offset by lower costs applicable to sales per silver ounce at palmarejo . for a complete discussion of costs applicable to sales , see results of operations below . amortization amortization decreased $ 18.1 million , or 12 % , due to fewer silver equivalent ounces sold at all operating sites . expenses general and administrative expenses decreased $ 2.3 million , or 7 % , primarily due to lower compensation costs . exploration expense decreased $ 4.9 million , or 16 % , as a result of lower exploration costs at palmarejo , rochester , kensington and la preciosa as the company focused its exploration efforts on capitalized infill resource conversion drilling in 2018. pre-development , reclamation , and other expenses increased $ 1.1 million , or 6 % , of which $ 3.4 million is attributable to the write-down of property , plant and equipment at rochester . other income and expenses fair value adjustments , net , were a gain of $ 3.6 million due to a a net gain on equity securities of $ 3.0 million coupled with favorable fair value adjustment of zinc options . effective january 1 , 2018 , as a result of asu 2016-01 , changes in the fair value of equity investments are recognized as fair value adjustments instead of other comprehensive income ( loss ) in the consolidated statements of comprehensive income ( loss ) . interest expense ( net of capitalized interest of $ 1.2 million ) increased to $ 24.4 million from $ 16.4 million , due to higher average debt levels related to the 2024 senior notes and the facility . other , net was an expense of $ 24.7 million , as a result of the $ 18.6 million write-down of the receivable consideration from the manquiri divestiture , unfavorable foreign exchange rate movements , a write-down of $ 6.5 million related to the rmc receivable , partially offset by gains on the sale of non-core assets and investments in 2017 . 37 income and mining taxes the company 's income and mining tax ( expense ) benefit consisted of : replace_table_token_19_th income and mining tax benefit of approximately $ 16.8 million results in an effective tax rate of 26 % for 2018. this compares to income tax expense of $ 29.0 million or effective tax rate of 73 % for 2017. the company 's effective tax rate is impacted by multiple factors as illustrated above . the comparability of the company 's income and mining tax ( expense ) benefit for the reported periods was primarily impacted by ( i ) variations in our income before income taxes ; ( ii ) geographic distribution of that income ; ( iii ) foreign exchange rates ; ( iv ) mining taxes ; ( v ) the non-recognition of tax assets and ( vi ) the impact of specific transactions . therefore , the effective tax rate will fluctuate , sometimes significantly , year to year . the following table summarizes the components of the company 's income ( loss ) before tax and income and mining tax ( expense ) benefit : replace_table_token_20_th a valuation allowance is provided for deferred tax assets for which it is more likely than not that the related benefits will not be realized . the company analyzes its deferred tax assets and if it is determined that the company will not realize all or a portion of its deferred tax assets , it will record or increase a valuation allowance . conversely , if it is determined that the company will ultimately be able to realize all or a portion of the related benefits for which a valuation allowance has been provided , all or a portion of the related valuation allowance will be reduced . there are a number of risk factors that could impact the company 's ability to realize its deferred tax assets . the utilization of u.s. net operating loss carryforwards , tax credit carryforwards , and recognized built-in losses may be subject to limitation under the rules regarding a change in stock ownership as determined by the internal revenue code and state tax laws . story_separator_special_tag metal sales were $ 274.8 million , or 38 % of coeur 's metal sales , compared with $ 141.3 million , or 24 % of coeur 's metal sales . costs applicable to sales per ounce decreased 12 % as a result of higher production . amortization increased to $ 73.7 million compared to $ 36.6 million , primarily due to higher production from guadalupe and independencia . capital expenditures decreased to $ 29.9 million due to lower underground development at independencia . capital expenditures focused on underground development and conversion drilling . rochester replace_table_token_26_th ( 1 ) see non-gaap financial performance measures . year ended december 31 , 2018 compared to year ended december 31 , 2017 silver equivalent production increased 7 % due to the timing of recoveries , partially offset by lower tons placed , which were anticipated following the decommissioning of a crusher . metal sales were $ 141.8 million , or 23 % of coeur 's metal sales , compared with $ 152.7 million , or 22 % of coeur 's metal sales . costs applicable to sales per ounce and amortization remained comparable at $ 13.17 and $ 20.9 million , respectively . capital expenditures decreased to $ 9.9 million from $ 40.9 million due to the completion of the stage iv leach pad expansion in 2017. capital expenditures focused on the purchase of mining equipment . year ended december 31 , 2017 compared to year ended december 31 , 2016 silver equivalent production increased 2 % due to the timing of recoveries , partially offset by lower tons placed . metal sales were $ 152.7 million , or 22 % of coeur 's metal sales , compared with $ 139.9 million , or 25 % of coeur 's metal sales . costs applicable to sales per silver equivalent ounce increased 11 % due to lower tons placed . amortization increased to $ 22.3 million due to higher production . capital expenditures increased to $ 40.9 million compared to $ 16.4 million due to the completion of the stage iv leach pad expansion . 44 kensington replace_table_token_27_th ( 1 ) see non-gaap financial performance measures . ( 2 ) prior to declaring commercial production in december , 2018 , the kensington mine produced 8,208 ounces sourced from the jualin deposit , which are excluded from production numbers presented , unless otherwise noted . year ended december 31 , 2018 compared to year ended december 31 , 2017 gold production decreased 8 % due to lower mill throughput resulting from lower mine ore production . including the 8,208 gold ounces that were sourced from the jualin deposit before commercial production was declared in december , gold production decreased by 1 % . metal sales were $ 132.9 million , or 21 % of coeur 's metal sales , compared to $ 154.5 million , or 22 % of coeur 's metal sales . costs applicable to sales per ounce were 14 % higher , primarily due to higher contractor costs and higher diesel costs . amortization decreased to $ 29.5 million from $ 36.0 million due to higher life of mine reserves and lower ounces sold . capital expenditures increased to $ 44.7 million resulting from increased underground development at kensington , jualin and raven and higher mining equipment expenditures . year ended december 31 , 2017 compared to year ended december 31 , 2016 gold production decreased 7 % due to lower grades mined , partially offset by higher mill throughput . metal sales were $ 154.5 million , or 22 % of coeur 's metal sales , compared to $ 146.6 million , or 26 % of coeur 's metal sales . costs applicable to sales per ounce were 16 % higher , primarily due to lower grade and higher contract mining costs . amortization increased to $ 36.0 million from $ 34.8 million due to higher ounces sold . capital expenditures remained comparable at $ 36.2 million . wharf replace_table_token_28_th ( 1 ) see non-gaap financial performance measures . year ended december 31 , 2018 compared to year ended december 31 , 2017 gold equivalent production decreased 19 % due to unplanned weather-related events and timing of leach pad recoveries . metal sales were $ 96.5 million , or 15 % of coeur 's metal sales , compared to $ 125.9 million , or 18 % of coeur 's metal sales . costs applicable to sales per gold equivalent ounce increased 26 % due to lower production resulting from the completion of mining at the higher-grade golden reward deposit in 2017 and higher equipment rental and diesel costs . amortization decreased to $ 11.1 million due to lower ounces sold . capital expenditures decreased to $ 3.4 million due to lower mining equipment and process plant expenditures . year ended december 31 , 2017 compared to year ended december 31 , 2016 gold equivalent production decreased 13 % due to lower grade , partially offset by higher tons placed . metal sales were $ 125.9 million , or 18 % of coeur 's metal sales , compared to $ 136.7 million , or 24 % of coeur 's metal sales . costs applicable to sales per gold equivalent ounce increased 15 % due to lower production resulting from the completion of mining at the higher-grade golden reward deposit and higher blasting costs . amortization was $ 13.0 million compared to $ 20.6 million due to lower production and higher life of mine reserves . capital expenditures increased to $ 8.8 million due to mining equipment and process plant expenditures . 45 silvertip replace_table_token_29_th ( 1 ) see non-gaap financial performance measures . ( 2 ) prior to september 1 , 2018 commercial production date the silvertip mine produced 0.2 million ounces of silver , 2.6 million pounds of zinc , and 1.8 million pounds of lead which are excluded from production numbers presented , unless otherwise noted . year ended december

net cash provided by operating activities for the years ended december 31 , 2018 , 2017 and 2016 was $ 20.1 million , $ 197.2 million and $ 96.5 million , respectively . net cash provided by operating activities was impacted by the following key factors for the applicable periods : replace_table_token_31_th ( 1 ) calculated by dividing the company 's total metal sales by total silver equivalent ounces ( based on a historical 60:1 ratio of silver ounces to gold ounces , 0.06:1 ratio of silver ounces to zinc pounds and 0.05:1 ratio of silver ounces to lead pounds ) . ( 2 ) see non-gaap financial performance measures . replace_table_token_32_th cash provided by operating activities decreased $ 177.1 million in the year ended december 31 , 2018 compared to the year ended december 31 , 2017 , primarily due to lower sales of gold and silver ( 15 % and 3 % , respectively ) at a lower operating margin per consolidated silver equivalent ounce . in addition , silvertip incurred higher than anticipated operating costs that included a $ 26.7 million write-down of metals inventory , and income and mining tax payments made by coeur mexicana in 2018 pertaining to 2017 palmarejo earnings . revenue for the year ended december 31 , 2018 decreased $ 83.7 million , $ 72.8 million of which was due to lower silver equivalent ounces sold and $ 10.9 million was due to lower average realized prices . cash provided by operating activities increased $ 100.7 million for the year ended december 31 , 2017 compared to the year ended december 31 , 2016 due to higher silver equivalent ounces sold and favorable working capital adjustments , partially offset by lower average realized prices and higher costs applicable to sales per consolidated silver equivalent ounce . metal sales for the year ended december 31 , 2017 increased $ 141.0 million , with $ 151.1 million due to higher silver equivalent ounces sold , partially offset by $ 10.1 million due to lower average realized prices .


 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.
     ```net cash provided by operating activities for the years ended december 31 , 2018 , 2017 and 2016 was $ 20.1 million , $ 197.2 million and $ 96.5 million , respectively . net cash provided by operating activities was impacted by the following key factors for the applicable periods : replace_table_token_31_th ( 1 ) calculated by dividing the company 's total metal sales by total silver equivalent ounces ( based on a historical 60:1 ratio of silver ounces to gold ounces , 0.06:1 ratio of silver ounces to zinc pounds and 0.05:1 ratio of silver ounces to lead pounds ) . ( 2 ) see non-gaap financial performance measures . replace_table_token_32_th cash provided by operating activities decreased $ 177.1 million in the year ended december 31 , 2018 compared to the year ended december 31 , 2017 , primarily due to lower sales of gold and silver ( 15 % and 3 % , respectively ) at a lower operating margin per consolidated silver equivalent ounce . in addition , silvertip incurred higher than anticipated operating costs that included a $ 26.7 million write-down of metals inventory , and income and mining tax payments made by coeur mexicana in 2018 pertaining to 2017 palmarejo earnings . revenue for the year ended december 31 , 2018 decreased $ 83.7 million , $ 72.8 million of which was due to lower silver equivalent ounces sold and $ 10.9 million was due to lower average realized prices . cash provided by operating activities increased $ 100.7 million for the year ended december 31 , 2017 compared to the year ended december 31 , 2016 due to higher silver equivalent ounces sold and favorable working capital adjustments , partially offset by lower average realized prices and higher costs applicable to sales per consolidated silver equivalent ounce . metal sales for the year ended december 31 , 2017 increased $ 141.0 million , with $ 151.1 million due to higher silver equivalent ounces sold , partially offset by $ 10.1 million due to lower average realized prices .
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 Suspicious Activity Report : ( 3 ) prior to september 2018 commercial production date the silvertip mine produced 0.2 million ounces of silver , 2.6 million pounds of zinc , and 1.8 million pounds of lead which are excluded from production numbers presented , unless otherwise noted . ( 4 ) prior to december 2018 commercial production date the jualin deposit at the kensington mine produced 8,208 ounces of gold which are excluded from the production numbers presented , unless otherwise noted . 36 consolidated financial results year ended december 31 , 2018 compared to year ended december 31 , 2017 revenue revenue decreased by $ 83.7 million as a result of fewer gold ( 15 % ) and silver ( 3 % ) ounces sold and an 8 % decrease in average realized silver prices , partially offset by an increase in average realized gold prices ( 1 % ) and sales from silvertip , which commenced commercial production in september 2018. the company sold 12.4 million silver ounces , 350,508 gold ounces , 4.4 million zinc pounds and 2.6 million lead pounds compared to 12.7 million silver ounces and 410,604 gold ounces in the prior year . gold contributed 68 % of sales , silver contributed 31 % , zinc contributed 1 % and lead contributed less than 1 % , compared to 70 % of sales from gold and 30 % from silver . costs applicable to sales costs applicable to sales remained comparable despite lower silver equivalent ounces sold due to a $ 26.7 million write-down of inventory at silvertip , higher costs applicable to sales per gold ounce at wharf and kensington , partially offset by lower costs applicable to sales per silver ounce at palmarejo . for a complete discussion of costs applicable to sales , see results of operations below . amortization amortization decreased $ 18.1 million , or 12 % , due to fewer silver equivalent ounces sold at all operating sites . expenses general and administrative expenses decreased $ 2.3 million , or 7 % , primarily due to lower compensation costs . exploration expense decreased $ 4.9 million , or 16 % , as a result of lower exploration costs at palmarejo , rochester , kensington and la preciosa as the company focused its exploration efforts on capitalized infill resource conversion drilling in 2018. pre-development , reclamation , and other expenses increased $ 1.1 million , or 6 % , of which $ 3.4 million is attributable to the write-down of property , plant and equipment at rochester . other income and expenses fair value adjustments , net , were a gain of $ 3.6 million due to a a net gain on equity securities of $ 3.0 million coupled with favorable fair value adjustment of zinc options . effective january 1 , 2018 , as a result of asu 2016-01 , changes in the fair value of equity investments are recognized as fair value adjustments instead of other comprehensive income ( loss ) in the consolidated statements of comprehensive income ( loss ) . interest expense ( net of capitalized interest of $ 1.2 million ) increased to $ 24.4 million from $ 16.4 million , due to higher average debt levels related to the 2024 senior notes and the facility . other , net was an expense of $ 24.7 million , as a result of the $ 18.6 million write-down of the receivable consideration from the manquiri divestiture , unfavorable foreign exchange rate movements , a write-down of $ 6.5 million related to the rmc receivable , partially offset by gains on the sale of non-core assets and investments in 2017 . 37 income and mining taxes the company 's income and mining tax ( expense ) benefit consisted of : replace_table_token_19_th income and mining tax benefit of approximately $ 16.8 million results in an effective tax rate of 26 % for 2018. this compares to income tax expense of $ 29.0 million or effective tax rate of 73 % for 2017. the company 's effective tax rate is impacted by multiple factors as illustrated above . the comparability of the company 's income and mining tax ( expense ) benefit for the reported periods was primarily impacted by ( i ) variations in our income before income taxes ; ( ii ) geographic distribution of that income ; ( iii ) foreign exchange rates ; ( iv ) mining taxes ; ( v ) the non-recognition of tax assets and ( vi ) the impact of specific transactions . therefore , the effective tax rate will fluctuate , sometimes significantly , year to year . the following table summarizes the components of the company 's income ( loss ) before tax and income and mining tax ( expense ) benefit : replace_table_token_20_th a valuation allowance is provided for deferred tax assets for which it is more likely than not that the related benefits will not be realized . the company analyzes its deferred tax assets and if it is determined that the company will not realize all or a portion of its deferred tax assets , it will record or increase a valuation allowance . conversely , if it is determined that the company will ultimately be able to realize all or a portion of the related benefits for which a valuation allowance has been provided , all or a portion of the related valuation allowance will be reduced . there are a number of risk factors that could impact the company 's ability to realize its deferred tax assets . the utilization of u.s. net operating loss carryforwards , tax credit carryforwards , and recognized built-in losses may be subject to limitation under the rules regarding a change in stock ownership as determined by the internal revenue code and state tax laws . story_separator_special_tag metal sales were $ 274.8 million , or 38 % of coeur 's metal sales , compared with $ 141.3 million , or 24 % of coeur 's metal sales . costs applicable to sales per ounce decreased 12 % as a result of higher production . amortization increased to $ 73.7 million compared to $ 36.6 million , primarily due to higher production from guadalupe and independencia . capital expenditures decreased to $ 29.9 million due to lower underground development at independencia . capital expenditures focused on underground development and conversion drilling . rochester replace_table_token_26_th ( 1 ) see non-gaap financial performance measures . year ended december 31 , 2018 compared to year ended december 31 , 2017 silver equivalent production increased 7 % due to the timing of recoveries , partially offset by lower tons placed , which were anticipated following the decommissioning of a crusher . metal sales were $ 141.8 million , or 23 % of coeur 's metal sales , compared with $ 152.7 million , or 22 % of coeur 's metal sales . costs applicable to sales per ounce and amortization remained comparable at $ 13.17 and $ 20.9 million , respectively . capital expenditures decreased to $ 9.9 million from $ 40.9 million due to the completion of the stage iv leach pad expansion in 2017. capital expenditures focused on the purchase of mining equipment . year ended december 31 , 2017 compared to year ended december 31 , 2016 silver equivalent production increased 2 % due to the timing of recoveries , partially offset by lower tons placed . metal sales were $ 152.7 million , or 22 % of coeur 's metal sales , compared with $ 139.9 million , or 25 % of coeur 's metal sales . costs applicable to sales per silver equivalent ounce increased 11 % due to lower tons placed . amortization increased to $ 22.3 million due to higher production . capital expenditures increased to $ 40.9 million compared to $ 16.4 million due to the completion of the stage iv leach pad expansion . 44 kensington replace_table_token_27_th ( 1 ) see non-gaap financial performance measures . ( 2 ) prior to declaring commercial production in december , 2018 , the kensington mine produced 8,208 ounces sourced from the jualin deposit , which are excluded from production numbers presented , unless otherwise noted . year ended december 31 , 2018 compared to year ended december 31 , 2017 gold production decreased 8 % due to lower mill throughput resulting from lower mine ore production . including the 8,208 gold ounces that were sourced from the jualin deposit before commercial production was declared in december , gold production decreased by 1 % . metal sales were $ 132.9 million , or 21 % of coeur 's metal sales , compared to $ 154.5 million , or 22 % of coeur 's metal sales . costs applicable to sales per ounce were 14 % higher , primarily due to higher contractor costs and higher diesel costs . amortization decreased to $ 29.5 million from $ 36.0 million due to higher life of mine reserves and lower ounces sold . capital expenditures increased to $ 44.7 million resulting from increased underground development at kensington , jualin and raven and higher mining equipment expenditures . year ended december 31 , 2017 compared to year ended december 31 , 2016 gold production decreased 7 % due to lower grades mined , partially offset by higher mill throughput . metal sales were $ 154.5 million , or 22 % of coeur 's metal sales , compared to $ 146.6 million , or 26 % of coeur 's metal sales . costs applicable to sales per ounce were 16 % higher , primarily due to lower grade and higher contract mining costs . amortization increased to $ 36.0 million from $ 34.8 million due to higher ounces sold . capital expenditures remained comparable at $ 36.2 million . wharf replace_table_token_28_th ( 1 ) see non-gaap financial performance measures . year ended december 31 , 2018 compared to year ended december 31 , 2017 gold equivalent production decreased 19 % due to unplanned weather-related events and timing of leach pad recoveries . metal sales were $ 96.5 million , or 15 % of coeur 's metal sales , compared to $ 125.9 million , or 18 % of coeur 's metal sales . costs applicable to sales per gold equivalent ounce increased 26 % due to lower production resulting from the completion of mining at the higher-grade golden reward deposit in 2017 and higher equipment rental and diesel costs . amortization decreased to $ 11.1 million due to lower ounces sold . capital expenditures decreased to $ 3.4 million due to lower mining equipment and process plant expenditures . year ended december 31 , 2017 compared to year ended december 31 , 2016 gold equivalent production decreased 13 % due to lower grade , partially offset by higher tons placed . metal sales were $ 125.9 million , or 18 % of coeur 's metal sales , compared to $ 136.7 million , or 24 % of coeur 's metal sales . costs applicable to sales per gold equivalent ounce increased 15 % due to lower production resulting from the completion of mining at the higher-grade golden reward deposit and higher blasting costs . amortization was $ 13.0 million compared to $ 20.6 million due to lower production and higher life of mine reserves . capital expenditures increased to $ 8.8 million due to mining equipment and process plant expenditures . 45 silvertip replace_table_token_29_th ( 1 ) see non-gaap financial performance measures . ( 2 ) prior to september 1 , 2018 commercial production date the silvertip mine produced 0.2 million ounces of silver , 2.6 million pounds of zinc , and 1.8 million pounds of lead which are excluded from production numbers presented , unless otherwise noted . year ended december

