Year	Cases per 100,000
1983	23.87375
1984	24.4675
1985	26.40125
1986	26.165
1987	27.64875
1988	29.7225
1989	31.53625
1990	30.67
1991	30.16
1992	29.22
1993	28.69
1994	28.04
1995	27.08
1996	26.21
1997	24.82
1998	23.74
1999	22.64
2000	21.77
2001	20.97
2002	20.26
2003	19.84
2004	19.06
2005	18.36
2006	17.93
2007	17.42
2008	17.08
2009	17.08
2010	16.75
2011	16.42
2012	16.09
2013	15.78
2014	15.21
2015	14.69
2016	14.8