Year	Cases per 100,000
1990	33.29
1991	33.23
1992	33.09
1993	32.71
1994	32.39
1995	32.38
1996	32.61
1997	32.25
1998	31.51
1999	30.01
2000	27.88
2001	27.35
2002	26.27
2003	26.38
2004	24.96
2005	23.86
2006	22.95
2007	22.16
2008	21.97
2009	21.62
2010	21.68
2011	21.64
2012	21.49
2013	20.5
2014	20.99
2015	20.26
2016	19.65