Year	Cases per 100,000
1990	16.56
1991	16.3
1992	16.38
1993	16.1
1994	15.77
1995	15.75
1996	15.43
1997	14.83
1998	14.59
1999	14.78
2000	15.3
2001	14.66
2002	13.96
2003	13.8
2004	13.53
2005	13.33
2006	13.4
2007	12.94
2008	13
2009	13.05
2010	13.01
2011	12.87
2012	12.64
2013	12.28
2014	12.58
2015	12.37
2016	12.28