| Characteristic | 2007 | 2012 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
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Source
Release date
May 2012
Region
Worldwide
Survey time period
2007 to 2012
Number of respondents
Approx. 1,000 per country and year
Age group
18 years and older
Method of interview
Face-to-face interviews, telephone interviews
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