| Characteristic | 2005 | 2007 | 2009 | 2011 | 2014 |
|---|---|---|---|---|---|
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
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Source
Release date
February 2014
Region
Worldwide
Survey time period
2005 to 2014
Supplementary notes
Percentage points exceeding or missing to 100 percent are probably due to rounding.
Total number of 2014 survey respondents: 5,128.
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