Year	Cases per 100,000
1963	4.45
1964	3.87
1965	3.88
1966	5.92
1967	5.32
1968	5.58
1969	5.06
1970	4.79
1971	5.859
1972	4.058
1973	5.687
1974	6.536
1975	6.055
1976	7.554
1977	6.603
1978	6.662
1979	7.651
1980	7.61
1981	7.329
1982	7.118
1983	8.517
1984	8.556
1985	9.295
1986	7.684
1987	9.683
1988	9.672
1989	11.061
1990	10.93
1991	11.32
1992	11.52
1993	11.81
1994	12.02
1995	12.3
1996	12.71
1997	13.3
1998	13.83
1999	14.87
2000	15.44
2001	16.15
2002	16.81
2003	17.59
2004	18.31
2005	19.11
2006	19.14
2007	19.7
2008	19.63
2009	19.82
2010	19.91
2011	19.61
2012	19.4
2013	18.91
2014	18.23
2015	17.84
2016	17.12