Taking a look around, it looks like we have a pretty diverse league:
Three teams from Germany (DIII x2, DII)
Two from the US (DIV x2) and the Czech Republic (DII, DI)
And the rest being one each from:
Venecuela (I)
France (IV)
Finland (III)
Hungary (II)
China (IV)
Spain (II)
Turkey (II)
Taiwan (I)
Poland (IV)
Three teams from D.I, 5 from D.II, 3 from D.III and 5 from D.IV.