Year	Cases per 100,000
1990	15.35
1991	15
1992	15.25
1993	15.63
1994	16.1
1995	16.67
1996	17.37
1997	17.74
1998	17.99
1999	17.94
2000	17.73
2001	17.31
2002	16.89
2003	16.41
2004	15.84
2005	15.19
2006	14.58
2007	14.25
2008	14.08
2009	13.72
2010	13.45
2011	13.26
2012	13.28
2013	13.2
2014	13.04
2015	12.91
2016	12.82