Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Index | Organization | Year | Rank | Out of |
| --- | --- | --- | --- | --- |
| Happy Planet Index | New Economics Foundation | 2006.0 | 84 | 178.0 |
| Human Development Index | United Nations Development Programme | 2009.0 | 19† | 169.0 |
| Legatum Prosperity Index | Legatum Institute | 2010.0 | 22 | 110.0 |
| Quality-of-Life Index | Economist Intelligence Unit | 2005.0 | 21 | 111.0 |
| Satisfaction with Life Index | University of Leicester | 2006.0 | 68 | 178.0 |
Question:
What year is the happy planet index?
Answer:
2006.0