Year	Cases per 100,000
1990	32.16
1991	31.86
1992	31.38
1993	30.83
1994	29.75
1995	28.52
1996	27.66
1997	26.76
1998	25.94
1999	24.99
2000	24.29
2001	23.78
2002	23.11
2003	22.53
2004	21.97
2005	21.42
2006	21.26
2007	20.81
2008	20.18
2009	19.68
2010	18.8
2011	18.08
2012	17.55
2013	16.88
2014	16.49
2015	16.29
2016	16.17