Countries Country 2004 2007 2010 2012
Austria 6.64 3.06 1.12 0.39
Belgium 17.28 11.47 29.84 10.4
Bulgaria 0 75.83 34.26 12.8
Czech Republic 20.14 14.19 7.7 4.75
Denmark 0.78 0.66
Finland 16.37 13.2 18.2 18.05
France 11.78 8.71 6.19 5.13
Germany 2.28 2.17 1.48 1.15
Greece 10.3 7.35 6.17 6.06
Hungary 12.16 4.64 7.06 4.45
Iceland 26.58 23.82
Italy 3.92 5.71 3.27 2.08
Lithuania 15.68 10.63 2.61 3.1
Netherlands 9.56 8.7 5.82 5.38
Norway 30.97 21.4 27.3 17.69
Poland 13.26 20.67 15.29 11.18
Portugal 21.55 20.19 10.6 10.44
Romania 0 9.53 5.85 2.8
Slovakia 19.84 21.13 19.31 13.68
Spain 7.67 5.33 4.73 5.12
Sweden 15.08 10.71 11.71 10.97
Switzerland 1.21 1.2
United Kingdom 16.35 11.96 10.66 9.28