Year	% of total enrollment
1971	20.61709
1972	20.97246
1973	19.51022
1974	19.14412
1975	17.21265
1976	15.69133
1977	14.21021
1978	11.33549
1980	10.1909
1983	23.23805
1985	22.46713
1986	20.75576
1987	21.21286
1988	20.30799
1989	19.35645
1993	16.47218
1999	10.03931
2000	12.30639
2004	7.97267
2007	16.83121