what is the variation of the additions during 2005 and 2006 , in thousands of dollars?
Important information:
table_1: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 83656 ;
table_4: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 89564 ;
table_7: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 96454 ;
Reasoning Steps:
Step: minus1-1(89564, 83656) = 5908
Program:
subtract(89564, 83656)
Program (Nested):
subtract(89564, 83656)

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
federal realty investment trust schedule iii summary of real estate and accumulated depreciation 2014continued three years ended december 31 , 2007 reconciliation of accumulated depreciation and amortization ( in thousands ) .
Table
balance december 31 2004                                             | $ 595338        
additions during period 2014depreciation and amortization expense    | 83656           
deductions during period 2014disposition and retirements of property | -15244 ( 15244 )
balance december 31 2005                                             | $ 663750        
additions during period 2014depreciation and amortization expense    | 89564           
deductions during period 2014disposition and retirements of property | -12807 ( 12807 )
balance december 31 2006                                             | $ 740507        
additions during period 2014depreciation and amortization expense    | 96454           
deductions during period 2014disposition and retirements of property | -80258 ( 80258 )
balance december 31 2007                                             | $ 756703        
.
Question: 
what is the variation of the additions during 2005 and 2006 , in thousands of dollars?
Important information:
table_1: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 83656 ;
table_4: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 89564 ;
table_7: balance december 31 2004 the additions during period 2014depreciation and amortization expense of $ 595338 is 96454 ;
Reasoning Steps:
Step: minus1-1(89564, 83656) = 5908
Program:
subtract(89564, 83656)
Program (Nested):
subtract(89564, 83656)
