http://healthresearchfunding.org/acl-injury-statistics/

This website above shows some facts about ACL injuries.

And heres just a couple interesting facts from the page. 
3. In a given year, there can be anywhere from 150, 000 to 200, 000 ACL injuries reported.
7. The top sports in which an ACL injury is a possibility are basketball, soccer, skiing, and football. What do all of those sports have in common? All of them make demands on the knees.
8. Although more ACL injuries occur in sports played by men, women are actually considered to be at a higher risk for ACL injuries.