Average age in national leagues.

28,29 Cyprus
27,07 Italy
26,90 Turkey
26,76 England
26,58 Spain
26,56 Poland
26,39 Russia
26,27 Sweden
26,16 France
26,10 Ukraine
25,94 Hungary
25,92 Portugal
25,90 Romania
25,89 Czech Republic
25,85 Greece
25,68 Bulgaria
25,67 Germany, Denmark
25,54 Scotland
25,47 Belgium
25,34 Slovakia
25,21 Norway
25,20 Switzerland
25,13 Austria
24,89 Finland
24,86 Serbia
24,56 Holland
24,12 Croatia
23,65 Slovenia

Photo: Werder Bremen vs Hoffenheim: two of Europe's youngest teams.

Percentage of Under-21 players in top division, 2004-2012.

Season 2012/13:
10,64% Germany
9,03% Italy
8,92% France
6,94% Spain
5,71% England

Highest percentage 2004-12:
14,71% France 2005/06
12,96% Germany 2010/11
11,38% England 2007/08
10,73% Spain 2007/08
9,03% Italy 2012/13

Lowest percentage:
8,92% France 2012/13
6,94% Spain 2012/13
4,78% England 2010/11
4,05% Italy 2011/12
3,86% Germany 2006/07

Euro 2012: average age of the squads.

Germany : 24 years, 11 months, 23 days
Poland : 25 years, 7 months, 23 days
England : 26 years, 4 months, 26 days
Denmark : 27 years, 14 days
Croatia : 27 years, 2 months
Spain : 27 years, 2 months, 2 days
France : 27 years, 3 months, 3 days
Portugal : 27 years, 6 months, 5 days
Holland : 27 years, 7 months, 24 days
Greece : 27 years, 9 months, 5 days
Czech Republic : 27 years, 9 months, 11 days
Ukraine : 27 years, 10 months, 5 days
Italy : 28 years, 3 months, 25 days
Ireland : 28 years, 9 months, 12 days
Sweden : 28 years, 9 months, 16 days
Russia : 28 years, 10 months, 10 days.