| country | 2006 | 2008 | 2010 |
|---|---|---|---|
| 13.1 | 14.0 | 15.6 | |
| Austria | 6.0 | 7.2 | 7.1 |
| Belgium | 5.5 | 6.4 | 7.8 |
| Bulgaria | 3.5 | 4.8 | |
| Cyprus | 2.3 | ||
| Czech Republic | 3.3 | 4.4 | |
| Denmark | 8.9 | 12.8 | 12.5 |
| Estonia | 3.8 | 3.5 | |
| Finland | 5.9 | 8.5 | 8.4 |
| France | 0.1 | 3.6 | 5.2 |
| Germany | 7.3 | 6.8 | 7.9 |
| Greece | 0.8 | 3.5 | 4.1 |
| Hungary | 1.8 | 3.7 | 3.3 |
| Iceland | 3.3 | ||
| Ireland | 8.8 | 7.8 | |
| Italy | 6.5 | 8.5 | |
| Latvia | 2.1 | 1.7 | |
| Lithuania | 1.8 | 2.3 | 2.1 |
| Luxembourg | 7.2 | 7.0 | 8.2 |
| Malta | 0.0 | 0.0 | 2.1 |
| Netherlands | 4.5 | 5.1 | 6.2 |
| Norway | 17.5 | 19.4 | 18.0 |
| Poland | 0.2 | 0.6 | 2.3 |
| Portugal | 0.4 | 3.3 | 3.8 |
| Romania | 0.3 | 1.1 | |
| Slovakia | 1.3 | 3.1 | 3.5 |
| Slovenia | 3.3 | ||
| Spain | 2.5 | 5.1 | 2.3 |
| Sweden | 13.5 | 13.4 | 14.4 |
| United Kingdom | 5.5 |