| Characteristic | Prevalence of use |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
June 2016
Region
Worldwide
Survey time period
2015
Supplementary notes
Australia: 2013 figures for those aged 14 and older.
Hong Kong, China: 2014 figures for those between 11 years old and above.
Israel: 2009 figures for those between 18-40 years old.
New Zealand: 2008 figures for those between 16-64 years old.
Spain: 2013 figures for those between 15-64 years old.
United Kingdom: 2014-15 figures for those between 15-59 years old.
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