Year	Cases per 100,000
1968	59.29
1969	59.01
1970	52.44
1971	50.9785
1972	53.597
1973	57.6955
1974	64.264
1975	63.9025
1976	58.711
1977	67.0295
1978	66.648
1979	68.9365
1980	70.445
1981	75.6335
1982	76.052
1983	74.8205
1984	75.529
1985	77.0275
1986	78.346
1987	84.5945
1988	89.133
1989	88.3115
1990	89.4
1991	92.42
1992	91.71
1993	96.63
1994	99.61
1995	96.71
1996	84.82
1997	83.21
1998	84.89
1999	80.23
2000	78.16
2001	80.58
2002	79.03
2003	76.13
2004	75.33
2005	73.29
2006	73.89
2007	74.95
2008	68.97
2009	65.14
2010	59.95
2011	58.8
2012	58.75
2013	52.74
2014	54.56
2015	52.19
2016	50.57