Year	Cases per 100,000
1990	16.12
1991	16.11
1992	16.11
1993	16.11
1994	16.12
1995	16.12
1996	16.36
1997	16.6
1998	16.85
1999	17.11
2000	17.38
2001	17.79
2002	18.23
2003	18.68
2004	19.14
2005	19.63
2006	19.78
2007	19.93
2008	20.09
2009	20.25
2010	20.41
2011	20.49
2012	20.57
2013	20.66
2014	20.74
2015	20.83
2016	20.92