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 ) . 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 was the variation in the additions during 2005 and 2006?

Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.
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 ) . 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 was the variation in the additions during 2005 and 2006?
