Year	Cases per 100,000
1990	17.05
1991	17.1
1992	17.27
1993	17.29
1994	17.35
1995	17.26
1996	17.05
1997	16.83
1998	16.65
1999	15.45
2000	14.6
2001	14.17
2002	14.03
2003	13.94
2004	13.94
2005	14.06
2006	14.18
2007	13.8
2008	13.54
2009	13.38
2010	13.31
2011	13.29
2012	12.79
2013	12.32
2014	11.84
2015	11.91
2016	11.92