Year	Cases per 100,000
1953	25.28
1954	23.97
1955	24.32
1956	26.74
1957	27.94
1958	27.1
1959	24.75
1960	26.89
1961	24.77
1962	28.55
1963	28.38
1964	29.19
1965	30.33
1966	30.92
1967	31.55
1968	31.45
1969	35.21
1970	33.49
1971	37.079
1972	36.358
1973	40.777
1974	44.276
1975	41.955
1976	45.274
1977	45.403
1978	46.862
1979	47.401
1980	51.47
1981	51.829
1982	52.908
1983	56.097
1984	57.506
1985	59.125
1986	65.104
1987	68.863
1988	70.432
1989	71.961
1990	72.95
1991	74.28
1992	75.69
1993	77.2
1994	78.79
1995	80.48
1996	82.59
1997	84.82
1998	87.19
1999	89.7
2000	92.37
2001	93.28
2002	94.23
2003	95.22
2004	96.25
2005	97.31
2006	97.62
2007	97.96
2008	98.36
2009	98.81
2010	99.33
2011	97.76
2012	96.29
2013	94.88
2014	93.52
2015	92.23
2016	90.99