Advocates of Title IX's current interpretation cite increases in female athletic participation, and attribute those increases to Title IX. One study, completed in 2006, pointed to a large increase in the number of women participating in athletics at both the high school and college level. The number of women in high school sports had increased by a factor of nine, while the number of women in college sports had increased by more than 450%. A 2008 study of intercollegiate athletics showed that women's collegiate sports have grown to 9,101 teams, or 8.65 per school. The five most frequently offered college sports for women are in order: (1) Basketball, 98.8% of schools have a team; (2) Volleyball, 95.7%; (3) Soccer, 92.0%; (4) Cross Country; 90.8%, and (5) Softball; 89.2%. The lowest rank for female sports teams is bowling. The exact percentage is not known, however there are only around 600 students on women's bowling teams in all three divisions in the NCAA.