Adams et al. (2011) [1] | Gearhart (2016) [8] | González et al. (2010) [9] | ||
---|---|---|---|---|
Austria | 25 | 18 | 18 | 9 |
Belgium | 23 | 22 | 21 | 21 |
Czech Republic | 7 | 9 | 4 | 5 |
Denmark | 12 | 24 | 26 | 25 |
Estonia | 3 | 1 | 1 | 2 |
Finland | 13 | 14 | 22 | 22 |
France | 21 | 19 | 12 | 19 |
Germany | 22 | 21 | 23 | 16 |
Greece | 11 | 4 | 13 | 13 |
Iceland | 1 | 11 | 14 | 15 |
Ireland | 10 | 20 | 19 | 24 |
Israel | 6 | 7 | 3 | 10 |
Italy | 14 | 10 | 10 | 11 |
Japan | 8 | 12 | 7 | 4 |
Korea | 5 | 6 | 5 | 1 |
Luxembourg | 4 | 15 | 8 | 7 |
Netherlands | 20 | 25 | 24 | 23 |
Poland | 9 | 2 | 2 | 3 |
Portugal | 15 | 3 | 15 | 12 |
Slovakia | 16 | 8 | 6 | 8 |
Slovenia | 2 | 13 | 20 | 6 |
Spain | 19 | 5 | 9 | 17 |
Sweden | 17 | 16 | 17 | 20 |
Switzerland | 24 | 17 | 16 | 18 |
UK | 18 | 23 | 11 | 14 |
US | 26 | 26 | 25 | 26 |