Year	Cases per 100,000
1990	12.39
1991	12.5
1992	12.61
1993	12.73
1994	12.85
1995	12.98
1996	13
1997	13.03
1998	13.05
1999	13.08
2000	13.11
2001	12.92
2002	12.73
2003	12.55
2004	12.37
2005	12.21
2006	12.05
2007	11.89
2008	11.74
2009	11.59
2010	11.45
2011	11.4
2012	11.34
2013	11.29
2014	11.24
2015	11.19
2016	11.15