Year	Cases per 100,000
1963	1.33
1964	2.54
1965	3.13
1966	4.37
1967	3.41
1968	3.51
1969	3.3
1970	3.57
1971	3.447
1972	3.494
1973	3.651
1974	2.978
1975	4.805
1976	4.672
1977	4.629
1978	3.866
1979	3.753
1980	3.18
1981	3.227
1982	3.904
1983	4.361
1984	3.808
1985	4.495
1986	5.312
1987	4.449
1988	5.486
1989	4.993
1990	5.45
1991	5.56
1992	5.68
1993	5.81
1994	5.94
1995	6.07
1996	6.32
1997	6.58
1998	6.86
1999	7.15
2000	7.45
2001	7.62
2002	7.8
2003	7.98
2004	8.17
2005	8.37
2006	8.49
2007	8.61
2008	8.74
2009	8.87
2010	9.02
2011	9.08
2012	9.15
2013	9.23
2014	9.3
2015	9.38
2016	9.47