| 1998 | ||
| 0 | European Union (15 countries) | 10442 |
| 1 | Belgium | 4634 |
| 2 | Denmark | 12892 |
| 3 | Germany | 5499 |
| 4 | Greece | 14482 |
| 5 | Spain | 7881 |
| 6 | France | 13638 |
| 7 | Ireland | 5816 |
| 8 | Italy | 5556 |
| 9 | Luxembourg | 2302 |
| 10 | Netherlands | 6298 |
| 11 | Austria | 2801 |
| 12 | Portugal | 12348 |
| 13 | Finland | 5025 |
| 14 | Sweden | 8195 |
| 15 | United Kingdom | 4199 |