| 1998 | ||
| 0 | EU 27 | .. |
| 1 | EU 15 | .. |
| 2 | Euro area 16 | 18 |
| 3 | Belgium | 18 |
| 4 | Bulgaria | 20 |
| 5 | Czech Republic | 18 |
| 6 | Denmark | 18 |
| 7 | Germany | 18 |
| 8 | Estonia | .. |
| 9 | Ireland | .. |
| 10 | Greece | 16 |
| 11 | Spain | 17 |
| 12 | France | .. |
| 13 | Italy | 18 |
| 14 | Cyprus | 20 |
| 15 | Latvia | 21 |
| 16 | Lithuania | 44 |
| 17 | Luxembourg | 46 |
| 18 | Hungary | 51 |
| 19 | Malta | 37 |
| 20 | Netherlands | .. |
| 21 | Austria | .. |
| 22 | Poland | 20 |
| 23 | Portugal | 15 |
| 24 | Romania | .. |
| 25 | Slovenia | 20 |
| 26 | Slovakia | 21 |
| 27 | Finland | .. |
| 28 | Sweden | .. |
| 29 | United Kingdom | .. |
| 30 | Croatia | .. |
| 31 | Turkey | .. |
| 32 | Iceland | .. |
| 33 | Norway | 31 |
| 34 | Switzerland | 23 |