9th Graders Chance for College By Age 19
Number of fall first-time freshmen enrolled anywhere in the U.S. / 9th graders 4 years earlier (by state)
Thomas Mortenson, "Chance for College by Age 19." Postsecondary Education Opportunity. http://www.postsecondary.org
Data are available biennially. The calculation doesn’t account for transfers to private high schools or out-of-state – between 9th and 12th grades. See the source listed for more data and information.