Year	Cases per 100,000
1990	13.46
1991	13.5
1992	13.97
1993	14.57
1994	15.41
1995	15.86
1996	16.29
1997	16.13
1998	16.22
1999	16.43
2000	16.17
2001	16.61
2002	16.76
2003	17.38
2004	17.18
2005	17.03
2006	17.2
2007	17.23
2008	17.29
2009	17.32
2010	17.5
2011	17.48
2012	17.27
2013	16.95
2014	16.74
2015	16.3
2016	15.9