| Characteristic | 2003 | 2009 | 2012 | 2012** |
|---|---|---|---|---|
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
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Sources
Release date
March 2012
Region
Worldwide
Survey time period
2003 to 2012
Supplementary notes
* Social security and Medicare only.
** Estimates.
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