federal realty investment trust schedule iii summary of real estate and accumulated depreciation - continued three years ended december 31 , 2011 reconciliation of accumulated depreciation and amortization ( in thousands ) balance , december 31 , 2008................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2009................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2010................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2011................................................................................................................................... .
$ 846258 103698 ( 11869 ) 938087 108261 ( 11144 ) 1035204 114180 ( 21796 ) $ 1127588 .

balance december 31 2008
$ 846258
additions during period 2014depreciation and amortization expense
103698
deductions during period 2014disposition and retirements of property
-11869 ( 11869 )
balance december 31 2009
938087
additions during period 2014depreciation and amortization expense
108261
deductions during period 2014disposition and retirements of property
-11144 ( 11144 )
balance december 31 2010
1035204
additions during period 2014depreciation and amortization expense
114180
deductions during period 2014disposition and retirements of property
-21796 ( 21796 )
balance december 31 2011
$ 1127588

federal realty investment trust schedule iii summary of real estate and accumulated depreciation - continued three years ended december 31 , 2011 reconciliation of accumulated depreciation and amortization ( in thousands ) balance , december 31 , 2008................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2009................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2010................................................................................................................................... .
additions during period 2014depreciation and amortization expense .................................................................... .
deductions during period 2014disposition and retirements of property ................................................................. .
balance , december 31 , 2011................................................................................................................................... .
$ 846258 103698 ( 11869 ) 938087 108261 ( 11144 ) 1035204 114180 ( 21796 ) $ 1127588 .

Question: what is the percentual growth of the depreciation and amortization expenses during 2008 and 2009?
Answer: 4.4%