It would be hard to say definately but in my guild it shakes out a bit like this:
Class Breakdown
Assassin: 6
Berserker: 7
Brigand: 6
Bruiser: 7
Coercer: 4
Conjuror: 6
Defiler: 5
Dirge: 6
Fury: 9
Guardian: 9
Illusionist: 7
Inquisitor: 6
Monk: 7
Mystic: 2
Necromancer: 7
Paladin: 2
Ranger: 10
Shadow Knight: 5
Swashbuckler: 10
Templar: 5
Troubador: 6
Warden: 5
Warlock: 5
Wizard: 6
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What's bred in the bone will not out of the flesh.