Select a chart to display. Charts summarize data by year. For detailed data see the Query . The source of the data is described in each chart. Note that the number of states reporting (demand) or institutions reporting (supply) in a given year will impact total numbers.
Database Updated: 3/20/20262025 Data Added (4/3/2026)
Questions about the site can be addressed to Michael Spiess (California State University, Chico). Click here to report a data error.