country20142015201620172018
Greece74722
Germany24722
Poland42433
Spain23146
Italy3137
Portugal5431
Belgium6132
Austria22106
Luxembourg22304
Hungary1135
Ireland3132
Slovenia11124
United Kingdom32121
Bulgaria2132
Romania3113
Czech Republic1222
France3121
Croatia23
Denmark21
Finland21
Latvia12
Slovakia111
Malta11
Netherlands11
Cyprus1
Estonia1
Sweden1