Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| Unnamed: 0                                     | 2006    | 2005    |
|:-----------------------------------------------|:--------|:--------|
| furniture and equipment                        | $ 97638 | $ 98387 |
| leasehold improvements                         | 74875   | 66318   |
| computers                                      | 19733   | 18971   |
| software                                       | 21274   | 18683   |
| total property and equipment gross             | 213520  | 202359  |
| less accumulated depreciation and amortization | 151985  | 147826  |
| total property and equipment net               | $ 61535 | $ 54533 |

Question:
what was the percent change in depreciation and amortization expense between 2004 and 2005?


pre_text: vertex pharmaceuticals incorporated notes to consolidated financial statements ( continued ) f .
marketable securities ( continued ) unrealized losses in the portfolio relate to various debt securities including u.s .
government securities , u.s .
government-sponsored enterprise securities , corporate debt securities and asset-backed securities .
for these securities , the unrealized losses are primarily due to increases in interest rates .
the investments held by the company are high investment grade and there were no adverse credit events .
because the company has the ability and intent to hold these investments until a recovery of fair value , which may be maturity , the company does not consider these investments to be other-than-temporarily impaired as of december 31 , 2006 and 2005 .
gross realized gains and losses for 2006 were $ 4000 and $ 88000 respectively .
gross realized gains and losses for 2005 were $ 15000 and $ 75000 , respectively .
gross realized gains and losses for 2004 were $ 628000 and $ 205000 , respectively .
g .
restricted cash at december 31 , 2006 and 2005 , the company held $ 30.3 million and $ 41.5 million respectively , in restricted cash .
at december 31 , 2006 and 2005 the balance was held in deposit with certain banks predominantly to collateralize conditional stand-by letters of credit in the names of the company 2019s landlords pursuant to certain operating lease agreements .
h .
property and equipment property and equipment consist of the following at december 31 ( in thousands ) : depreciation and amortization expense for the years ended december 31 , 2006 , 2005 and 2004 was $ 25.4 million , $ 26.3 million and $ 28.4 million , respectively .
in 2006 and 2005 , the company wrote off certain assets that were fully depreciated and no longer utilized .
there was no effect on the company 2019s net property and equipment .
additionally , the company wrote off or sold certain assets that were not fully depreciated .
the net loss on disposal of those assets was $ 10000 for 2006 , $ 344000 for 2005 and $ 43000 for 2004 .
i .
altus investment altus pharmaceuticals , inc .
( 201caltus 201d ) completed an initial public offering in january 2006 .
as of the completion of the offering , vertex owned 817749 shares of common stock and warrants to purchase 1962494 shares of common stock ( the 201caltus warrants 201d ) .
in addition , the company , as of the completion .
post_text: furniture and equipment $ 97638 $ 98387 leasehold improvements 74875 66318 computers 19733 18971 software 21274 18683 total property and equipment , gross 213520 202359 less accumulated depreciation and amortization 151985 147826 total property and equipment , net $ 61535 $ 54533 .
label: -0.07394
qa: answer: -7.4%
ann_text_rows: 14
steps: op: minus1-1
arg1: 26.3
arg2: 28.4
res: -2.1
op: divide1-2
arg1: #0
arg2: 28.4
res: -7.4%
program: subtract(26.3, 28.4), divide(#0, 28.4)
gold_inds: text_14: property and equipment property and equipment consist of the following at december 31 ( in thousands ) : depreciation and amortization expense for the years ended december 31 , 2006 , 2005 and 2004 was $ 25.4 million , $ 26.3 million and $ 28.4 million , respectively .
exe_ans: -0.07394
tfidftopn: table_6: The less accumulated depreciation and amortization of 2006 is 151985 ; The less accumulated depreciation and amortization of 2005 is 147826 ;
text_18: the net loss on disposal of those assets was $ 10000 for 2006 , $ 344000 for 2005 and $ 43000 for 2004 .
program_re: divide(subtract(26.3, 28.4), 28.4)
model_input: text_12
at december 31 , 2006 and 2005 the balance was held in deposit with certain banks predominantly to collateralize conditional stand-by letters of credit in the names of the company 2019s landlords pursuant to certain operating lease agreements .
text_14
property and equipment property and equipment consist of the following at december 31 ( in thousands ) : depreciation and amortization expense for the years ended december 31 , 2006 , 2005 and 2004 was $ 25.4 million , $ 26.3 million and $ 28.4 million , respectively .
table_6
the less accumulated depreciation and amortization of 2006 is 151985 ; the less accumulated depreciation and amortization of 2005 is 147826 ;