| Characteristic | Number of participants in the qualifying phase |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
September 2017
Region
Europe
Survey time period
1960 to 2020
Supplementary notes
Data prior to 2020 comes from .
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