Year	Cases per 100,000
1963	48.61
1964	45.9
1965	41.07
1966	45.25
1967	43.41
1968	42.75
1969	40.85
1970	41.85
1971	42.9125
1972	39.075
1973	44.1175
1974	46.21
1975	42.9825
1976	46.615
1977	42.2675
1978	43
1979	44.6425
1980	39.975
1981	40.6575
1982	39.38
1983	37.1725
1984	37.855
1985	38.9475
1986	39.71
1987	36.8225
1988	41.365
1989	41.6975
1990	40.3
1991	39.62
1992	39.12
1993	39.16
1994	37.81
1995	36.7
1996	35.27
1997	35.13
1998	34.38
1999	33.33
2000	32.03
2001	31.16
2002	30.27
2003	29.44
2004	28.48
2005	27.12
2006	26.26
2007	25.39
2008	24.47
2009	23.62
2010	22.94
2011	21.98
2012	21.44
2013	21.04
2014	20.19
2015	20.54
2016	20.47