http://www.all-athletics.com/en-us/2010-11-30/how-many-men-ran-11-sec-or-faster-100m-yearCan you guess how many athletes ran 11.00 seconds or faster on 100m in the World in 2010? 
We can tell you: 3778! 
And in the different Areas? And what about the 200m? 
All-Athletics.com publishes some interesting statistical summaries from its incredibly deep 2010 Top Lists: 
Men’s 100m 
10.50 sec or faster:  528 athletes 
Africa: 42
 Asia: 85
 Europe: 122
 North and Central America: 245
 Oceania: 13
 South America: 21 
11.00 sec or faster: 3778 athletes 
Africa: 225
 Asia: 380
 Europe: 1178
 North and Central America: 1726
 Oceania: 106
 South America: 163 
Men’s 200m 
21.00 sec or faster: 302 athletes 
Africa: 30
 Asia: 21
 Europe: 72
 North and Central America: 161
 Oceania: 8
 South America: 10 
22.00 sec or faster: 2625 athletes 
Africa: 171
 Asia: 265
 Europe: 744
 North and Central America: 1268
 Oceania: 74
 South America: 103 
Notes:
 - The 200m All-Athletics.com 2010 Top Lists are published until 22.40 sec – 3925 athletes.
 - The analysis is based on results received and processed until 29 November. The Top Lists are permanently updated.
 - To view the full lists subscribe for an All-Access Pass.
Pretty cool stats just thought I'd share. 
Edit- Of course these stats underestimate exactly how many people are capable of those times because in a lot of regions there is no access to track and field. Also there's a lot of elite athletes that play other sports that could run sub 11 or maybe even sub 10.5 (mainly NFL sub 10.5) but yeh it still gives a good indication of times. If that list was expanded to sub 11.5 than there would probably be 30,000+ athletes under that time.