| 1997 | ||
| 0 | EU (15 countries) | 45.8 |
| 1 | Belgium | 27.4 |
| 2 | Denmark | 9.0 |
| 3 | Germany | 3.2 |
| 4 | Greece | 16.3 |
| 5 | Spain | 50.4 |
| 6 | France | 21.7 |
| 7 | Ireland | 4.1 |
| 8 | Italy | 0.7 |
| 9 | Luxembourg | 21.2 |
| 10 | Netherlands | 31.1 |
| 11 | Austria | 16.8 |
| 12 | Portugal | 4.3 |
| 13 | Finland | 1.4 |
| 14 | Sweden | 40.7 |
| 15 | United Kingdom | 54.3 |