Year	Cases per 100,000
1990	16.47
1991	16.19
1992	15.9
1993	15.59
1994	15.27
1995	14.93
1996	14.53
1997	14.12
1998	13.63
1999	13.23
2000	12.75
2001	12.46
2002	11.87
2003	11.39
2004	10.98
2005	10.71
2006	10.37
2007	10.04
2008	9.81
2009	9.5
2010	9.22
2011	8.89
2012	8.67
2013	8.46
2014	8.23
2015	8.01
2016	7.8