| country | 2000 | 2006 | 2012 | change |
|---|---|---|---|---|
| Austria | 13.8 | 16.7 | 18.6 | 1.9 |
| Belgium | 1.5 | 2.1 | 4.4 | 2.3 |
| Bulgaria | None | 0.1 | 0.8 | 0.7 |
| Croatia | None | None | 2.4 | None |
| Czech Republic | None | 7.2 | 13.1 | 5.9 |
| Denmark | 5.9 | 5.1 | 7.3 | 2.2 |
| Estonia | None | 9.6 | 14.9 | 5.3 |
| European Union (15 countries) | 3.0 | 4.4 | None | None |
| European Union (25 countries) | None | 4.1 | None | None |
| European Union (27 countries) | None | 3.7 | 5.7 | 2.0 |
| European Union (28 countries) | None | None | 5.7 | None |
| Finland | 6.7 | 6.3 | 8.7 | 2.4 |
| France | 1.2 | 1.7 | 3.6 | 1.9 |
| Germany | 3.2 | 4.9 | 5.8 | 0.9 |
| Hungary | None | 2.1 | 2.4 | 0.3 |
| Ireland | 0.6 | 0.9 | 1.1 | 0.2 |
| Italy | 6.7 | 7.9 | 8.9 | 1.0 |
| Latvia | None | 9.4 | 10.6 | 1.2 |
| Lithuania | None | 3.5 | 5.5 | 2.0 |
| Luxembourg | 0.8 | 2.4 | 2.7 | 0.3 |
| Malta | None | 0.2 | 0.3 | 0.1 |
| Netherlands | 1.6 | 2.5 | 2.6 | 0.1 |
| Poland | None | 1.0 | 4.6 | 3.6 |
| Portugal | 1.2 | 7.2 | 6.1 | -1.1 |
| Romania | None | 0.8 | 2.1 | 1.3 |
| Slovakia | None | 6.2 | 8.6 | 2.4 |
| Slovenia | None | 5.5 | 7.3 | 1.8 |
| Spain | 1.5 | 3.7 | 7.5 | 3.8 |
| Sweden | 5.9 | 7.2 | 15.8 | 8.6 |
| United Kingdom | 3.3 | 3.4 | 3.4 | 0.0 |