| 2001 | ||
| 0 | EU (15 countries) | 4.6 |
| 1 | Belgium | 4.2 |
| 2 | Denmark | 3.0 |
| 3 | Germany | 3.6 |
| 4 | Greece | 6.2 |
| 5 | Spain | 5.7 |
| 6 | France | 4.4 |
| 7 | Ireland | 4.9 |
| 8 | Italy | 4.9 |
| 9 | Luxembourg | 3.9 |
| 10 | Netherlands | 3.7 |
| 11 | Austria | 3.7 |
| 12 | Portugal | 6.4 |
| 13 | Finland | 3.4 |
| 14 | Sweden | 3.1 |
| 15 | United Kingdom | 5.2 |