Year	Cases per 100,000
1990	17.93
1991	18.33
1992	18.65
1993	19.06
1994	19.75
1995	20.81
1996	19.24
1997	17.95
1998	16.74
1999	15.86
2000	15.28
2001	14.73
2002	15.91
2003	16.51
2004	16.91
2005	17
2006	16.77
2007	16.46
2008	17.09
2009	17.19
2010	17.9
2011	17.2
2012	16.81
2013	16.66
2014	16.64
2015	16.74
2016	16.82