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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 | $595,338 |
| --------- | --------- |
| Additions during period—depreciation and amortization expense | 83,656 |
| Deductions during period—disposition and retirements of property | (15,244) |
| Balance, December 31, 2005 | $663,750 |
| Additions during period—depreciation and amortization expense | 89,564 |
| Deductions during period—disposition and retirements of property | (12,807) |
| 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 |
.
Please compute the result.
what was the variation in the additions during 2005 and 2006?
assistant
5908.0
human
and the increase in the deductions in 2006 and 2007?
assistant
67451.0