| Countries | Total(37) | OECD(28) | High-OECD(19) | Middle-OECD(9) | Non-OECD(9) |
|---|---|---|---|---|---|
| 1 | Albania | Albania | |||
| 2 | Australia | Australia | Australia | ||
| 3 | Austria | Austria | Austria | ||
| 4 | Belgium | Belgium | Belgium | ||
| 5 | Bulgaria | Bulgaria | |||
| 6 | Croatia | Croatia | |||
| 7 | Czech Republic | Czech Republic | Czech Republic | ||
| 8 | Finland | Finland | Finland | ||
| 9 | Former Yugoslav Republic of Macedonia | Former Yugoslav Republic of Macedonia | |||
| 10 | Georgia | Georgia | |||
| 11 | Germany | Germany | Germany | ||
| 12 | Greece | Greece | Greece | ||
| 13 | Hungary | Hungary | Hungary | ||
| 14 | Iceland | Iceland | Iceland | ||
| 15 | India | India | |||
| 16 | Ireland | Ireland | Ireland | ||
| 17 | Israel | Israel | Israel | ||
| 18 | Japan | Japan | Japan | ||
| 19 | Korea | Korea | Korea | ||
| 20 | Latvia | Latvia | Latvia | ||
| 21 | Lithuania | Lithuania | |||
| 22 | Luxembourg | Luxembourg | Luxembourg | ||
| 23 | Moldova | Moldova | |||
| 24 | Netherlands | Netherlands | Netherlands | ||
| 25 | New Zealand | New Zealand | New Zealand | ||
| 26 | Norway | Norway | Norway | ||
| 27 | Poland | Poland | Poland | ||
| 28 | Portugal | Portugal | Portugal | ||
| 29 | Russia | Russia | |||
| 30 | Slovak Republic | Slovak Republic | Slovak Republic | ||
| 31 | Slovenia | Slovenia | Slovenia | ||
| 32 | Spain | Spain | Spain | ||
| 33 | Sweden | Sweden | Sweden | ||
| 34 | Switzerland | Switzerland | Switzerland | ||
| 35 | Turkey | Turkey | Turkey | ||
| 36 | United Kingdom | United Kingdom | United Kingdom | ||
| 37 | United States | United States | United States |