Year	%
1971	72.10982
1972	67.61085
1973	74.00635
1974	83.04826
1975	97.46631
1976	74.37578
1977	83.25935
1979	83.07991
1982	68.36677
1984	94.56623
1985	87.85127
1986	80.06724
1987	76.14889
1988	78.63106
1999	85.44604