Year	Cases per 100,000
1990	15.86
1991	16.04
1992	16.11
1993	16.23
1994	16.33
1995	16.42
1996	16.45
1997	16.17
1998	16.1
1999	15.93
2000	16.03
2001	16.03
2002	15.91
2003	15.69
2004	15.57
2005	15.44
2006	15.76
2007	16.22
2008	16.7
2009	17.22
2010	17.76
2011	17.94
2012	18.19
2013	18.49
2014	18.58
2015	18.58
2016	18.91