20+: not worth talking about. old people, fat people, woman, etc
19-20: mediocre high schoolers
18-19: average high schoolers
17-18: above average high schoolers
16-17: elite high schoolers
15-16: win state or just about any road 5k
14-15: the most elite college runners, professionals
13-14: national record holders, professionals
sub 13: probably 20 people ever
does this sound about right?