| Characteristic | Number of customers |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Region
Worldwide
Survey time period
2000 to 2016
Supplementary notes
The figures for 2000 through 2006 are taken from a previous edition of the publication.
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