Year	Cases per 100,000
1953	15.61
1954	16.77
1955	14.93
1956	16.52
1957	14.79
1958	16.54
1959	16.5
1960	17.59
1961	17.18
1962	18.24
1963	18.41
1964	18.37
1965	19.22
1966	19.41
1967	21.15
1968	22.83
1969	21.21
1970	23.11
1971	23.5815
1972	24.083
1973	24.7445
1974	27.906
1975	27.6875
1976	31.209
1977	34.1305
1978	36.232
1979	35.9435
1980	39.105
1981	39.9665
1982	41.378
1983	44.7395
1984	43.181
1985	47.5625
1986	47.244
1987	46.7755
1988	48.457
1989	50.2785
1990	52.84
1991	53.51
1992	54.19
1993	54.89
1994	55.6
1995	56.32
1996	57.18
1997	58.05
1998	58.94
1999	59.84
2000	60.78
2001	60.87
2002	60.97
2003	61.08
2004	61.18
2005	61.29
2006	61.49
2007	61.68
2008	61.88
2009	62.08
2010	62.29
2011	62.2
2012	62.12
2013	62.04
2014	61.97
2015	61.89
2016	61.83