Year	Per 100,000 People
1968	20.6796
1969	22.2346
1978	19.9171
1979	20.5477
1980	21.2462
1981	22.7721
1982	22.3654
1983	22.6144
1984	23.2329
1985	22.5249
1986	22.2982
1987	23.3357
1988	22.128
1989	22.3916
1990	20.7746