| 1998 | ||
| 0 | EU (15 countries) | 25.1 |
| 1 | Belgium | 8.9 |
| 2 | Denmark | 3.0 |
| 3 | Germany | 15.7 |
| 4 | Greece | 44.6 |
| 5 | Spain | 21.3 |
| 6 | France | 4.3 |
| 7 | Ireland | 1.1 |
| 8 | Italy | 21.8 |
| 9 | Luxembourg | 53.5 |
| 10 | Netherlands | 16.5 |
| 11 | Austria | 4.5 |
| 12 | Portugal | 1.6 |
| 13 | Finland | 41.2 |
| 14 | Sweden | 34.6 |
| 15 | United Kingdom | 25.0 |