| Germany | 64 donors |
| United Kingdom | 37 donors |
| Italy | 19 donors |
| Austria | 17 donors |
| Spain | 10 donors |
| Netherlands | 10 donors |
| France | 10 donors |
| Sweden | 8 donors |
| Switzerland | 8 donors |
| Russia | 6 donors |
| Belgium | 6 donors |
| Poland | 5 donors |
| Ireland | 4 donors |
| Denmark | 4 donors |
| Cyprus | 4 donors |
| Norway | 4 donors |
| Iceland | 2 donors |
| Slovenia | 2 donors |
| Ukraine | 1 donor |
| Croatia | 1 donor |
| Serbia | 1 donor |
| Greece | 1 donor |
| Finland | 1 donor |
| Czech Republic | 1 donor |
| Hungary | 1 donor |