Year	Cases per 100,000
1990	22.95
1991	22.91
1992	22.91
1993	22.71
1994	22.31
1995	21.85
1996	21.71
1997	20.95
1998	20.08
1999	19.62
2000	19.23
2001	19.09
2002	18.71
2003	18.12
2004	17.89
2005	17.77
2006	17.47
2007	17.16
2008	16.7
2009	16.11
2010	15.45
2011	15
2012	14.65
2013	14.3
2014	14.17
2015	14.13
2016	13.99