Year	Cases per 100,000
1990	39.49
1991	39.23
1992	38.97
1993	38.71
1994	38.46
1995	38.22
1996	37.66
1997	37.12
1998	36.59
1999	36.06
2000	35.55
2001	34.86
2002	34.18
2003	33.52
2004	32.88
2005	32.25
2006	31.63
2007	31.02
2008	30.42
2009	29.84
2010	29.28
2011	29.32
2012	29.36
2013	29.41
2014	29.46
2015	29.51
2016	29.56