Year	Per 100,000 People
1970	21.651
1971	19.8034
1972	17.7601
1973	16.9406
1974	17.8926
1975	21.1822
1976	20.8754
1977	27.5158
1992	27.1057
1993	25.68
1994	28.8436
1995	27.2411
1996	25.6129