| Country | 2000 | 2005 | 2010 |
|---|---|---|---|
| Belarus | 2.1 | 1.0 | 1.2 |
| Czech Republic | 11.6 | 11.6 | |
| Poland | 5.6 | ||
| Slovakia | 26.2 | 26.2 | |
| Ukraine | 25.0 | 26.0 | 27.0 |
| Austria | 13.7 | 17.4 | 20.3 |
| Belgium | 7.1 | 7.0 | 7.3 |
| Germany | 11.5 | 11.5 | 15.0 |
| Ireland | 6.6 | 6.3 | |
| Luxembourg | 11.6 | 11.6 | |
| Netherlands | 4.5 | 8.1 | 9.8 |
| Switzerland | 14.5 | 17.9 | 21.3 |
| United Kingdom | 3.9 | 3.9 | 3.9 |
| Denmark | 4.9 | 5.1 | |
| Estonia | 9.9 | 12.5 | 14.6 |
| Finland | 5.6 | 5.7 | 5.7 |
| Latvia | 6.0 | 17.7 | 17.7 |
| Lithuania | 23.0 | 23.0 | 23.0 |
| Norway | 6.8 | ||
| Sweden | 6.5 | 7.9 | 8.2 |
| Russian Federation | 21.9 | 21.8 | 22.0 |
| Croatia | 14.0 | ||
| Slovenia | 14.9 | 17.0 | 19.1 |
| Italy | 8.3 | 8.7 | 9.1 |
| Portugal | 2.8 |