Year	Cases per 100,000
1990	15.07
1991	14.85
1992	15
1993	14.86
1994	15.28
1995	15.19
1996	15.3
1997	15.9
1998	16.43
1999	16.77
2000	17.06
2001	17.19
2002	17.68
2003	17.91
2004	18.36
2005	18.47
2006	18.63
2007	18.56
2008	18.39
2009	18.09
2010	17.89
2011	17.66
2012	17.46
2013	17.28
2014	17.02
2015	16.64
2016	16.36