Year	Per 100,000 People
1961	30.0712
1963	18.894
1964	10.9794
1977	16.351
1978	14.3573
1979	12.6632
1980	13.7243
1982	19.3815
1984	22.3975
1985	21.0397
1986	23.7869
1987	22.8765
1988	23.6768
1991	24.8535