Year	Cases per 100,000
1990	30.55
1991	29.85
1992	28.62
1993	27.01
1994	24.6
1995	21.33
1996	17.62
1997	15.06
1998	14.09
1999	13.75
2000	13.46
2001	13.18
2002	12.91
2003	12.65
2004	12.42
2005	12.19
2006	12
2007	11.77
2008	11.55
2009	11.37
2010	11.17
2011	10.97
2012	11.13
2013	11
2014	10.91
2015	10.86
2016	10.82