Year	Per 100,000 People
1968	31.922
1969	35.3628
1978	37.6384
1979	38.7515
1980	38.3718
1981	41.6765
1982	42.367
1983	40.3888
1984	41.7639
1985	40.0221
1986	42.852
1987	44.4802
1988	42.1542
1989	42.7111
1990	40.2426