Year	Cases per 100,000
1990	24.57
1991	23.92
1992	23.79
1993	23.56
1994	23.46
1995	23.76
1996	23.9
1997	23.28
1998	22.76
1999	21.73
2000	21.16
2001	20.56
2002	20.37
2003	19.95
2004	19.3
2005	18.74
2006	18.37
2007	17.9
2008	17.45
2009	17.01
2010	16.54
2011	16.21
2012	15.82
2013	15.33
2014	14.94
2015	14.8
2016	14.6