Year	Cases per 100,000
1990	19.36
1991	19.39
1992	19.45
1993	18.86
1994	18.32
1995	17.97
1996	17.55
1997	17.19
1998	16.92
1999	16.7
2000	16.4
2001	16.11
2002	15.83
2003	15.92
2004	16.08
2005	16.06
2006	15.97
2007	15.92
2008	15.87
2009	15.89
2010	15.95
2011	16.14
2012	16.32
2013	16.45
2014	16.62
2015	16.78
2016	16.93