Note: Data are based on a nationally representative, longitudinal study of more than 23,000 students from 944 schools who were ninth graders in 2009. Socioeconomic status was measured in the fall of 2009 by assigning a composite score based on parental education and occupations and family income. Students who enrolled in college within a year of completing high school were considered to have "persisted" if they were either still enrolled or had completed a postsecondary credential as of February 2016, about three years after most respondents had completed high school.