Year	Cases per 100,000
1990	22.26
1991	22.22
1992	22.81
1993	23.42
1994	23.53
1995	23.21
1996	22.79
1997	22.27
1998	21.58
1999	21.11
2000	20.48
2001	19.87
2002	19.44
2003	18.88
2004	18.16
2005	17.47
2006	16.71
2007	16.16
2008	15.99
2009	16.13
2010	16.03
2011	15.64
2012	15.11
2013	14.52
2014	13.91
2015	13.87
2016	13.82