Year	Cases per 100,000
1990	10.09
1991	10.51
1992	11.04
1993	11.7
1994	12.55
1995	14.18
1996	14.62
1997	15.1
1998	15.62
1999	16.17
2000	16.78
2001	17.04
2002	17.32
2003	17.61
2004	17.92
2005	18.25
2006	18.12
2007	17.99
2008	17.86
2009	17.75
2010	17.64
2011	17.41
2012	17.19
2013	16.98
2014	16.78
2015	16.58
2016	16.4