| Characteristic | 2008 | 2009 | 2010 * |
|---|---|---|---|
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
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Source
Release date
July 2010
Region
Worldwide
Survey time period
2008 to 2010
Supplementary notes
* Figures are estimates.
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