Approximately 25% of the University of Delaware's undergraduate student population is affiliated with a fraternity or sorority. There are over 26 fraternities and 20 sororities (chapters & colonies) in the Interfraternity Council (IFC), National Panhellenic Conference (NPC), and Multicultural Greek Congress (MGC). They all coordinate via the Greek Council. All Greek organizations participate in an accreditation process called the Chapter Assessment Program (CAP). CAP ratings award chapters with either a Gold, Silver, Bronze, Satisfactory or Needs Improvement designation. This system is an expansion from the Five Star program of the late 1990s, requiring contributions to community service, philanthropy, university events, diversity education, professional education, a chapter/colony GPA greater than or equal to the all men's or all women's average, and attendance and compliance with numerous other criteria.