Year	Cases per 100,000
1990	13.05
1991	13.02
1992	13
1993	12.99
1994	12.98
1995	12.97
1996	13.07
1997	13.19
1998	13.3
1999	13.42
2000	13.56
2001	13.4
2002	13.26
2003	13.12
2004	12.99
2005	12.87
2006	12.75
2007	12.61
2008	12.49
2009	12.38
2010	12.27
2011	12.16
2012	12.06
2013	11.97
2014	11.87
2015	11.78
2016	11.7