Year	Cases per 100,000
1990	15.17
1991	14.88
1992	14.64
1993	14.53
1994	14.42
1995	14.18
1996	14.03
1997	13.87
1998	13.88
1999	13.63
2000	13.71
2001	13.93
2002	14.01
2003	14.67
2004	14.59
2005	14.79
2006	14.86
2007	15.07
2008	15.51
2009	15.33
2010	15.32
2011	15.09
2012	14.95
2013	14.88
2014	14.76
2015	14.61
2016	14.47