Year	Cases per 100,000
1990	16.11
1991	15.97
1992	15.85
1993	15.75
1994	15.63
1995	15.55
1996	15.47
1997	15.39
1998	15.3
1999	15.15
2000	14.99
2001	14.86
2002	14.77
2003	14.69
2004	14.61
2005	14.51
2006	14.38
2007	14.24
2008	14.08
2009	13.93
2010	13.77
2011	13.6
2012	13.49
2013	13.35
2014	13.23
2015	13.14
2016	13.01