Year	Cases per 100,000
1990	15.16
1991	15.36
1992	15.57
1993	15.79
1994	16.02
1995	16.28
1996	16.47
1997	16.66
1998	16.87
1999	17.07
2000	17.3
2001	17.43
2002	17.57
2003	17.71
2004	17.86
2005	18.01
2006	18.13
2007	18.25
2008	18.37
2009	18.49
2010	18.62
2011	18.78
2012	18.95
2013	19.13
2014	19.31
2015	19.49
2016	19.68