Here is a list I found in one of Barry Sear's books. He wrote the Zone Diet.
Athletes and their BF% when in their prime.
MALES:
Gymnast/Wrestler 4
Bodybuilder 5
Basketball Centers 7
Cross Country Skiers 8
Racquetball 9
Baseball/Soccer 10
Swimmers 10
Distance Runners 11
Football Defensive Backs 11
Basketball Guards/Linebackers 12
Football Offensive Backs 13
Ideal Male 15
Power Lifter/Shot Put 17
Average American Male 23
FEMALES:
Average Anorexic 10
Gymnast 14
Racquetball 15
Aerobic Dance 17
Cross Country Skier 18
Swimmer 19
Tennis/Alpine Skier 20
Track Field 21
Basketball/Volleyball 21
Ideal Female 22
Average Female 32