human
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 | $740,507 |
| --------- | --------- |
| Additions during period—depreciation and amortization expense | 96,454 |
| Deductions during period—disposition and retirements of property | (80,258) |
| Balance, December 31, 2007 | 756,703 |
| Additions during period—depreciation and amortization expense | 101,321 |
| Deductions during period—disposition and retirements of property | (11,766) |
| Balance, December 31, 2008 | 846,258 |
| Additions during period—depreciation and amortization expense | 103.698 |
| Deductions during period—disposition and retirements of property | (11,869) |
| Balance, December 31, 2009 | $938,087 |
.
Please answer the following questions with expressions if necessary.
for the years of 2006 and 2007, what was the combined total of additions, in thousands?
assistant
add(96454, 101321)
human
and what were those additions in 2008?
assistant
103.698
human
n/a
assistant
add(96454, 101321), multiply(const_1000, 103.698)
human
including, then, 2008, what becomes that total of additions?
assistant
add(96454, 101321), multiply(const_1000, 103.698), add(#0, #1)
human
and what was the average between the three years?
assistant
add(96454, 101321), multiply(const_1000, 103.698), add(#0, #1), divide(#2, const_3)
human
and only between the years of 2007 and 2008, what was the change in the deductions?
assistant
subtract(11766, 80258)