| Characteristic | 2011 | 2016 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
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Region
Worldwide
Survey time period
2011
Age group
Supplementary notes
* The source specifies that the estimated value for 2016 referred to a period of time between three to five years.
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