Year	Cases per 100,000
1990	5.42
1991	5.36
1992	5.31
1993	5.25
1994	5.2
1995	5.15
1996	5.05
1997	4.95
1998	4.86
1999	4.77
2000	4.68
2001	4.67
2002	4.66
2003	4.65
2004	4.64
2005	4.63
2006	4.71
2007	4.78
2008	4.85
2009	4.93
2010	5.01
2011	5.13
2012	5.26
2013	5.39
2014	5.53
2015	5.67
2016	5.81