Year	Cases per 100,000
1990	17.92
1991	17.66
1992	17.9
1993	18.47
1994	19.25
1995	19.84
1996	20.53
1997	20.95
1998	22.03
1999	21.27
2000	20.71
2001	20.19
2002	19.78
2003	18.91
2004	17.99
2005	17.29
2006	16.68
2007	15.79
2008	15.35
2009	14.98
2010	14.68
2011	14.46
2012	14.35
2013	14.33
2014	14.48
2015	14.47
2016	14.47