operate drafts once a year, in which each league's teams selected eligible prospects. Eligibility differs from league to league. Baseball and ice hockey operate minor league systems for players who have finished education but are not ready or good enough for the major leagues. The NBA also has a development league for players who are not ready to play at the top level. College sports The extent to which sports are associated with secondary and tertiary education in the United States is rare among nations. Millions of students participate in athletics programs operated by high schools and colleges. Student-athletes often receive scholarships to colleges in recognition of their athletic potential. Currently, the largest governing body of collegiate sports is the National Collegiate Athletic Association (NCAA). Especially in football and basketball, college sports are followed in numbers equaling those of professional sports. College football games can draw over 100,000 spectators. For upper-tier institutions, sports are a significant source of revenue; for less prominent teams, maintaining a high-level team is a major expense. To ensure some semblance of competitive balance, the NCAA divides its institutions into three divisions (four in football), sorted by the number of athletic scholarships each school is willing to offer. The most practiced college sports, measured by NCAA reporting on varsity team participation, are: (1) football (64,000), (2) baseball/softball (47,000), (3) track and field (46,000), (4) soccer (43,000), (5) basketball (32,000), (6) cross-country running (25,000), and (7) swimming/diving (20,000). The most popular sport among female athletes is soccer, followed closely by track and field. Junior college athletics are governed by separate bodies. In most of the country, all sports at that level are governed by the National Junior College Athletic Association (NJCAA). California's community colleges have their own governing body, the California Community College Athletic Association (CCCAA; usually pronounced as "3C-2A"). In the Pacific Northwest, most sports are governed by the Northwest Athletic Conference (NWAC). Because the NWAC does not sponsor football, members that play football do so as part of the NJCAA. High school sports Most public high schools are members of their respective state athletic association, and those associations are members of the National Federation of State High School Associations (NFHS). Some states have separate associations for public and non-public high schools. The 2018–19 school year was the first in 30 years to see a decrease in high school sports participation. Increases through the previous decades