| Year | Public 4-Year | |
| 2019 | $9,349 | |
| 2018 | $9,212 | |
| 2017 | $9,036 | |
| 2016 | $8,804 | |
| 2015 | $8,778 | |
| 2014 | $8,543 | |
| 2013 | $8,312 | |
| 2012 | $8,070 | |
| 2011 | $7,713 | |
| 2010 | $7,132 | |
| 2009 | $6,717 | |
| 2008 | $6,312 | |
| 2007 | $5,943 | |
| 2006 | $5,666 | |
| 2005 | $5,351 | |
| 2004 | $5,027 | |
| 2003 | $4,587 | |
| 2002 | $4,046 | |
| 2001 | $3,735 | |
| 2000 | $3,501 | |
| 1999 | $3,349 | |
| 1998 | $3,229 | |
| 1997 | $3,110 | |
| 1996 | $2,987 | |
| 1995 | $2,848 | |
| 1994 | $2,681 | |
| 1993 | $2,537 | |
| 1992 | $2,349 | |
| 1991 | $2,117 | |
| 1990 | $1,888 | |
| 1989 | $1,780 | |
| 1988 | $1,646 | |
| 1987 | $1,537 | |
| 1986 | $1,414 | |
| 1985 | $1,318 | |
| 1984 | $1,228 | |
| 1983 | $1,148 | |
| 1982 | $1,031 | |
| 1981 | $909 | |
| 1980 | $804 | |
| 1979 | $738 | |
| 1978 | $688 | |
| 1977 | $655 | |
| 1976 | $617 | |
| 1975 | $542 | |
| 1974 | $512 | |
| 1973 | $514 | |
| 1972 | $503 | |
| 1971 | $428 | |
| 1970 | $394 | |
| 1969 | $358 | |
| 1968 | $321 | |
| 1967 | $310 | |
| 1966 | $302 | |
| 1965 | Unavailable | |
| 1964 | Unavailable | |
| 1963 | $243 | |