Year	Cases per 100,000
1990	15.4
1991	15.39
1992	15.4
1993	15.4
1994	15.4
1995	15.41
1996	15.26
1997	15.12
1998	14.98
1999	14.84
2000	14.71
2001	14.67
2002	14.64
2003	14.61
2004	14.58
2005	14.56
2006	14.86
2007	15.15
2008	15.46
2009	15.78
2010	16.12
2011	16.49
2012	16.89
2013	17.3
2014	17.72
2015	18.16
2016	18.61