Please answer the given financial question based on the context.
Context: federal realty investment trust schedule iii summary of real estate and accumulated depreciation 2014continued three years ended december 31 , 2009 reconciliation of accumulated depreciation and amortization ( in thousands ) .
|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|
|additions during period 2014depreciation and amortization expense|101321|
|deductions during period 2014disposition and retirements of property|-11766 ( 11766 )|
|balance december 31 2008|846258|
|additions during period 2014depreciation and amortization expense|103.698|
|deductions during period 2014disposition and retirements of property|-11869 ( 11869 )|
|balance december 31 2009|$ 938087|
.
Question: considering the years 2006-2009 , what is the value of the average additions?


Answer: The answer is:100491.0