user
Instruction
Answer the question based on the provided table.


Table
Table Title: wealth rankings
Table Content:
<table border="1" cellspacing="0">
<tr> <td rowspan="2"> year </td> <td colspan="2"> sunday times rich list </td> <td colspan="2"> forbes the world's billionaires </td> </tr>
<tr> <td> rank </td> <td> net worth (gb£) bn </td> <td> rank </td> <td> net worth (us$) bn </td> </tr>
<tr> <td> 2005 </td> <td> none </td> <td> none </td> <td> 3 </td> <td> $25.00 </td> </tr>
<tr> <td> 2006 </td> <td> 1 </td> <td> £14.88 </td> <td> 5 </td> <td> $23.50 </td> </tr>
<tr> <td> 2007 </td> <td> 1 </td> <td> £19.25 </td> <td> 5 </td> <td> $32.00 </td> </tr>
<tr> <td> 2008 </td> <td> 1 </td> <td> £27.70 </td> <td> 4 </td> <td> $45.00 </td> </tr>
<tr> <td> 2009 </td> <td> 1 </td> <td> £10.80 </td> <td> 8 </td> <td> $19.30 </td> </tr>
<tr> <td> 2010 </td> <td> 1 </td> <td> £22.45 </td> <td> 5 </td> <td> $28.70 </td> </tr>
<tr> <td> 2011 </td> <td> 1 </td> <td> £17.50 </td> <td> 6 </td> <td> $31.10 </td> </tr>
<tr> <td> 2012 </td> <td> 1 </td> <td> £12.70 </td> <td> 21 </td> <td> $20.70 </td> </tr>
<tr> <td> 2013 </td> <td> 4 </td> <td> £10.00 </td> <td> 41 </td> <td> $16.50 </td> </tr>
<tr> <td> 2014 </td> <td> 3 </td> <td> £10.25 </td> <td> 52 </td> <td> $13.70 </td> </tr>
<tr> <td> 2015 </td> <td> 7 </td> <td> £9.20 </td> <td> 82 </td> <td> $13.50 </td> </tr>
<tr> <td> 2016 </td> <td> 11 </td> <td> £7.12 </td> <td> 135 </td> <td> 8.4 </td> </tr>
</table>


Question
in 2016, what was the rank of forbes mittal as wealthiest billionaire?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["135.0"]