Year	Cases per 100,000
1990	23.16
1991	24.53
1992	25.99
1993	27.55
1994	29.21
1995	30.98
1996	31.81
1997	32.67
1998	33.55
1999	34.47
2000	35.41
2001	34.98
2002	34.56
2003	34.15
2004	33.74
2005	33.34
2006	32.96
2007	32.59
2008	32.22
2009	31.86
2010	31.51
2011	31.11
2012	30.72
2013	30.34
2014	29.96
2015	29.59
2016	29.23