Year	Cases per 100,000
1990	18.17
1991	18.31
1992	18.46
1993	18.6
1994	18.75
1995	18.91
1996	18.81
1997	18.73
1998	18.64
1999	18.55
2000	18.47
2001	18.26
2002	18.05
2003	17.85
2004	17.66
2005	17.47
2006	17.68
2007	17.88
2008	18.09
2009	18.3
2010	18.53
2011	18.9
2012	19.28
2013	19.68
2014	20.08
2015	20.5
2016	20.94