Year	Cases per 100,000
1983	26.12
1984	27.99
1985	30.38
1986	32.48
1987	35.87
1988	39.76
1989	41.47
1990	42.56
1991	42.92
1992	43.29
1993	43.67
1994	44.05
1995	44.44
1996	44.15
1997	43.88
1998	43.61
1999	43.34
2000	43.08
2001	42.65
2002	42.23
2003	41.82
2004	41.41
2005	41.01
2006	40.41
2007	39.82
2008	39.24
2009	38.67
2010	38.11
2011	37.46
2012	36.82
2013	36.19
2014	35.58
2015	34.97
2016	34.4