Year	Cases per 100,000
1958	4.69
1959	1.17
1960	2.12
1961	4.6
1963	2.03
1964	3.75
1965	3.05
1966	1.89
1967	4.24
1968	1.88
1969	2.72
1970	1.76
1971	3.968
1972	2.646
1973	1.174
1974	2.012
1975	4.15
1976	3.158
1977	0.946
1978	3.914
1979	2.822
1980	0.78
1981	3.118
1982	2.866
1983	2.824
1984	1.092
1985	2.15
1986	3.398
1987	3.156
1988	5.124
1989	2.652
1990	3.09
1991	3.18
1992	3.27
1993	3.36
1994	3.46
1995	3.56
1996	3.66
1997	3.77
1998	3.88
1999	4
2000	4.12
2001	4.24
2002	4.37
2003	4.5
2004	4.63
2005	4.77
2006	4.91
2007	5.04
2008	5.18
2009	5.32
2010	5.48
2011	5.72
2012	5.99
2013	6.26
2014	6.55
2015	6.86
2016	7.18