Products of clubs' youth systems in national leagues.

40,3% Slovakia
39,7% Croatia
33,8% Finland
33,7% Slovenia
32,5% Denmark
32,0% Czech Republic
30,2% Israel
29,0% Sweden
28,4% Switzerland
26,5% Austria
26,1% Scotland
25,8% Norway, Hungary
25,6% Spain
23,8% Serbia
21,8% Holland
21,1% France
20,5% Belarus
19,1% Ukraine
17,5% England
16,4% Poland
16,2% Bulgaria
15,4% Greece
14,7% Germany
14,5% Romania
13,7% Belgium
12,9% Russia
11,1% Cyprus
9,5% Portugal
9,3% Turkey
7,8% Italy