Year	Cases per 100,000
1990	38.32
1991	38.11
1992	37.97
1993	37.9
1994	37.83
1995	37.9
1996	37.88
1997	37.69
1998	38.02
1999	37.88
2000	37.8
2001	37.15
2002	36.71
2003	36.23
2004	35.5
2005	34.96
2006	34.57
2007	34.32
2008	34.05
2009	33.81
2010	33.51
2011	33.09
2012	33.01
2013	32.84
2014	32.64
2015	32.43
2016	32.24