Year	% of total enrollment
1971	3.13121
1972	2.65616
1973	2.76598
1974	2.78198
1975	2.62482
1976	2.45434
1977	2.75274
1978	2.76503
1979	2.74858
1980	2.58112
1981	2.53416
1982	2.42584
1983	2.30318
1984	2.16895
1985	2.17867