Year	Per 100,000 People
1968	1.7012
1969	1.6189
1978	1.318
1979	1.2598
1980	1.0435
1981	1.3406
1982	1.3072
1983	1.1006
1984	1.1072
1985	1.1271
1986	1.2014
1987	1.2367
1988	1.1207
1989	0.9793
1990	0.9833