Year	Cases per 100,000
1990	7.25
1991	7.14
1992	7.03
1993	6.94
1994	6.84
1995	6.76
1996	6.64
1997	6.69
1998	6.68
1999	6.67
2000	6.64
2001	6.63
2002	6.63
2003	6.62
2004	6.6
2005	6.58
2006	6.55
2007	6.56
2008	6.54
2009	6.6
2010	6.68
2011	6.85
2012	6.98
2013	7.11
2014	7.26
2015	7.41
2016	7.53