Year	Cases per 100,000
1990	11.4
1991	11.65
1992	11.93
1993	12.24
1994	12.61
1995	13.11
1996	13.44
1997	13.8
1998	14.19
1999	14.61
2000	15.08
2001	15.29
2002	15.51
2003	15.73
2004	15.97
2005	16.22
2006	16.78
2007	17.37
2008	18.01
2009	18.69
2010	19.43
2011	19.71
2012	20.01
2013	20.33
2014	20.65
2015	20.98
2016	21.33