Year	Cases per 100,000
1990	17.26
1991	17.2
1992	17.16
1993	17.13
1994	17.1
1995	17.09
1996	17.11
1997	17.13
1998	17.16
1999	17.19
2000	17.22
2001	17.38
2002	17.55
2003	17.73
2004	17.9
2005	18.09
2006	18.3
2007	18.52
2008	18.74
2009	18.97
2010	19.21
2011	19.31
2012	19.42
2013	19.53
2014	19.64
2015	19.75
2016	19.87