Year	Cases per 100,000
1990	16.98
1991	16.93
1992	16.92
1993	16.98
1994	17.08
1995	17.07
1996	17.02
1997	16.97
1998	16.87
1999	16.77
2000	16.68
2001	16.6
2002	16.33
2003	16.06
2004	15.84
2005	15.61
2006	15.39
2007	15.12
2008	14.89
2009	14.62
2010	14.35
2011	14.09
2012	13.81
2013	13.56
2014	13.34
2015	13.14
2016	12.98