Year	Cases per 100,000
1990	34.85
1991	34.86
1992	34.22
1993	34.03
1994	33.58
1995	32.25
1996	31.28
1997	29.94
1998	28.46
1999	26.84
2000	26.48
2001	24.35
2002	23.29
2003	22.14
2004	21.54
2005	21.25
2006	21.29
2007	20.41
2008	20.26
2009	19.95
2010	19.88
2011	19.35
2012	19.26
2013	19.42
2014	19.93
2015	20.39
2016	20.77