Year	Cases per 100,000
1990	16.01
1991	16.19
1992	16.38
1993	16.57
1994	16.76
1995	16.96
1996	17.45
1997	17.96
1998	18.5
1999	19.05
2000	19.63
2001	19.85
2002	20.07
2003	20.3
2004	20.53
2005	20.77
2006	20.74
2007	20.71
2008	20.68
2009	20.65
2010	20.63
2011	20.76
2012	20.89
2013	21.02
2014	21.16
2015	21.29
2016	21.43