Year	Cases per 100,000
1990	17.33
1991	17.39
1992	17.47
1993	17.55
1994	17.63
1995	17.71
1996	17.9
1997	18.09
1998	18.29
1999	18.48
2000	18.69
2001	18.88
2002	19.07
2003	19.27
2004	19.47
2005	19.68
2006	19.81
2007	19.94
2008	20.08
2009	20.21
2010	20.36
2011	20.49
2012	20.63
2013	20.77
2014	20.92
2015	21.06
2016	21.21