Year	Cases per 100,000
1990	9.4
1991	10.01
1992	11.72
1993	12.56
1994	13.18
1995	13.76
1996	14.46
1997	15.11
1998	15.87
1999	16.98
2000	17.23
2001	17.46
2002	17.44
2003	17.22
2004	16.37
2005	16.3
2006	17.26
2007	17.73
2008	17.99
2009	18.13
2010	18.19
2011	18.2
2012	17.9
2013	17.4
2014	16.99
2015	16.58
2016	16.21