Year	Cases per 100,000
1990	17.47
1991	17.63
1992	17.8
1993	17.97
1994	18.15
1995	18.34
1996	19.23
1997	20.2
1998	21.26
1999	22.41
2000	23.68
2001	24.63
2002	25.66
2003	26.75
2004	27.9
2005	29.13
2006	29.85
2007	30.58
2008	31.35
2009	32.15
2010	32.99
2011	33.24
2012	33.52
2013	33.79
2014	34.08
2015	34.36
2016	34.67