| 1997 | ||
| 0 | EU (15 countries) | 1.9 |
| 1 | Belgium | 1.7 |
| 2 | Denmark | 2.0 |
| 3 | Germany | 2.1 |
| 4 | Greece | 1.9 |
| 5 | Spain | 2.1 |
| 6 | France | 2.0 |
| 7 | Ireland | 1.8 |
| 8 | Italy | 2.1 |
| 9 | Luxembourg | 1.8 |
| 10 | Netherlands | 1.7 |
| 11 | Austria | 2.1 |
| 12 | Portugal | 1.3 |
| 13 | Finland | 1.3 |
| 14 | Sweden | 1.4 |
| 15 | United Kingdom | 1.7 |