Members
as of 04 December 2021
| Germany | 729 |
| Italy | 345 |
| United Kingdom | 304 |
| Spain | 247 |
| France | 230 |
| Poland | 196 |
| Switzerland | 175 |
| Denmark | 175 |
| The Netherlands | 168 |
| Sweden | 157 |
| Austria | 122 |
| Belgium | 95 |
| Finland | 82 |
| Norway | 82 |
| Russian Federation | 78 |
| Greece | 74 |
| Ireland | 71 |
| Israel | 68 |
| Czech Republic | 68 |
| Romania | 66 |
| Iceland | 65 |
| Hungary | 61 |
| Ukraine | 60 |
| Serbia | 50 |
| Turkey | 46 |
| Slovenia | 43 |
| Croatia | 40 |
| Bulgaria | 31 |
| Slovakia | 29 |
| Luxembourg | 28 |
| Portugal | 26 |
| Lithuania | 24 |
| Kosovo | 24 |
| Latvia | 22 |
| Bosnia and Herzegovina | 22 |
| Estonia | 21 |
| North Macedonia | 18 |
| Georgia | 17 |
| Cyprus | 14 |
| United States | 12 |
| Montenegro | 8 |
| Albania | 7 |
| Malta | 5 |
| Palestinian Territories | 4 |
| Armenia | 4 |
| Kazakhstan | 3 |
| Greenland | 3 |
| Belarus | 3 |
| Moldova | 3 |
| Australia | 1 |
| Hong Kong | 1 |
| Colombia | 1 |
| Kyrgyzstan | 1 |
| Canada | 1 |
| Azerbaijan | 1 |