| Characteristic | 2006 | 2013 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
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Source
Release date
February 2014
Region
Worldwide
Survey time period
2006 and 2013
Supplementary notes
Percentage points exceeding 100 percent are probably due to rounding.
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