There's no one national body which systematically tracks state-level graduate retention; Indiana relies on a Lilly-grant decennial study jointly carried out by IU and the Indiana Fiscal Policy Institute, with some input from the National Center for Education Statistics. As of the 2000s edition, the national average graduate retention rate was 71.5%; Illinois' rate, 81.6%; Michigan's, 79.6%; Ohio's, 74.8%; Wisconsin's, 61.6%; Kentucky's, 80.2%; ours, 53.4%. (The worst rates are in the Plains States plus New Jersey, which has long been an 'outlier' in this regard, mostly since they have by far the country's highest population density.) Purdue and IUB do have quite a few out-of-state students, enough so that both have hit the top 10 nationwide for % of out-of-state students in some years, so that certainly is a factor; however, Indiana's retention rate for in-state students is still only 61%. As for the other stat, 28% of our labor force has a college degree, compared to the national average of 39%.