Amherst's resources, faculty, and academic life allow the college to enroll students with a range of talents, interests, and commitments. Students represent 49 states, the District of Columbia, Puerto Rico, and fifty-four countries. The median family income of Amherst students is $158,200, with 51% of students coming from the top 10% highest-earning families and 24% from the bottom 60%. Ninety-eight percent of students live on campus. Ninety-six percent of Amherst freshmen enrolled in Fall 2015 returned for their sophomore year; ninety-three percent of the most recent cohort graduated within six years. There are more than 140 student groups at Amherst. More than a third of the student body are members of a varsity athletics team.