| 1999 | ||
| 0 | EU (15 countries) | 4.7 |
| 1 | Belgium | 4.0 |
| 2 | Denmark | 2.9 |
| 3 | Germany | 3.7 |
| 4 | Greece | 6.6 |
| 5 | Spain | 6.5 |
| 6 | France | 4.4 |
| 7 | Ireland | 5.0 |
| 8 | Italy | 5.3 |
| 9 | Luxembourg | 3.6 |
| 10 | Netherlands | 3.6 |
| 11 | Austria | 3.6 |
| 12 | Portugal | 6.7 |
| 13 | Finland | 3.0 |
| 14 | Sweden | 3.0 |
| 15 | United Kingdom | 4.7 |