| Characteristic | Number of registered members in millions |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
October 2014
Region
Worldwide
Survey time period
December 2010 to October 2014
Supplementary notes
Figures for months other than January 2013 come from earlier publications.
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