dgm6780 on 24 March 2008
stickball - little off with proclaiming dominance of those 3 divisions
super bowl championships breakdown by division
AFC
east - 6
north - 7
south - 1
west - 6
nfc
east - 11
north - 4
west - 6
south - 1
so the nfc north that you like has only 4 , and 2 of those were from AFL-NFL championship games , and not technically superbowls nfc north = 6th position
and your "about %70" is actually 52%
