Reading support:
The graph depicts the fan interest of U.S. American consumers in a variety of sports in 2011. Shown is the percentage of American adults who are fans of the sport. 45 percent of the survey respondents said they were (avid) fans of college football.
Scarborough Sports Marketing defines "avid fans" as consumers who are "very interested" and "fans" as respondents who are "very, somewhat, or a little interested" in a given sport.