| Characteristic | Number of unique visitors in millions |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
December 2012
Region
Worldwide
Survey time period
October 2012
Age group
15 years and older
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