user
Instruction
Answer the question based on the provided table.


Table
Table Title: this table displays the results of source of value-added growth period, 1981 to 2000, 2000 to 2008 and 1981 to 2009, calculated using percent and percentage points units of measure (appearing as column headers)
Table Content:
<table border="1" cellspacing="0">
<tr> <td rowspan="3">  </td> <td colspan="3"> period </td> </tr>
<tr> <td> 1981 to 2000 </td> <td> 2000 to 2008 </td> <td> 1981 to 2009 </td> </tr>
<tr> <td colspan="3"> percent </td> </tr>
<tr> <td> value-added growth (log), annual average </td> <td> 3.22 </td> <td> 0.39 </td> <td> 2.31 </td> </tr>
<tr> <td>  </td> <td colspan="3"> percentage points </td> </tr>
<tr> <td> contribution </td> <td colspan="3">  </td> </tr>
<tr> <td> labour input </td> <td> 0.08 </td> <td> 0.84 </td> <td> 0.32 </td> </tr>
<tr> <td> produced capital input </td> <td> 2.45 </td> <td> 4.64 </td> <td> 3.16 </td> </tr>
<tr> <td> natural capital input </td> <td> 0.43 </td> <td> 0.16 </td> <td> 0.34 </td> </tr>
<tr> <td> multifactor productiivty </td> <td> 0.26 </td> <td> -5.25 </td> <td> -1.51 </td> </tr>
<tr> <td>  </td> <td colspan="3"> percent </td> </tr>
<tr> <td> multifactor productivity growth (log), annual average before adding natural capital </td> <td> -0.04 </td> <td> -6.96 </td> <td> -2.27 </td> </tr>
</table>


Question
from 1981 to 2009,what's the percentage of the log growth of value-added in oil and gas extraction per year?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["-2.27"]