Year	Cases per 100,000
1990	7.08
1991	7.05
1992	7.04
1993	7.02
1994	7
1995	6.99
1996	6.91
1997	6.83
1998	6.76
1999	6.68
2000	6.61
2001	6.52
2002	6.44
2003	6.36
2004	6.28
2005	6.2
2006	6.17
2007	6.13
2008	6.1
2009	6.07
2010	6.04
2011	5.99
2012	5.94
2013	5.89
2014	5.85
2015	5.8
2016	5.76