Year	Cases per 100,000
1963	24.71
1964	26.74
1965	21.39
1966	19.55
1967	24.18
1968	19.42
1969	16.96
1970	14.51
1971	20.499
1972	20.798
1973	17.737
1974	18.746
1975	19.895
1976	17.734
1977	17.603
1978	16.312
1979	15.181
1980	17.89
1981	17.519
1982	16.738
1983	17.157
1984	18.576
1985	20.475
1986	16.934
1987	17.243
1988	18.032
1989	18.811
1990	18.58
1991	19.22
1992	19.04
1993	19.19
1994	19.51
1995	19.57
1996	19.53
1997	19.26
1998	18.41
1999	18.19
2000	17.88
2001	17.13
2002	16.77
2003	16.56
2004	16.19
2005	15.13
2006	14.1
2007	13.61
2008	13
2009	12.61
2010	12.4
2011	12.1
2012	11.97
2013	11.77
2014	11.33
2015	11.45
2016	11.18