Year	Cases per 100,000
1983	3.03
1984	2.45
1985	2.43
1986	3.04
1987	3.6
1988	3.71
1989	2.93
1990	3.43
1991	3.6
1992	3.77
1993	3.96
1994	4.15
1995	4.36
1996	4.55
1997	4.74
1998	4.95
1999	5.17
2000	5.41
2001	5.63
2002	5.88
2003	6.13
2004	6.4
2005	6.68
2006	6.85
2007	7.03
2008	7.22
2009	7.41
2010	7.61
2011	7.75
2012	7.89
2013	8.03
2014	8.18
2015	8.33
2016	8.49