Year	Cases per 100,000
1990	5.52
1991	5.49
1992	5.63
1993	5.72
1994	6.02
1995	6.17
1996	6.35
1997	6.47
1998	6.68
1999	6.71
2000	6.6
2001	6.46
2002	6.36
2003	6.3
2004	6.29
2005	6.2
2006	6.18
2007	6.15
2008	6.1
2009	5.99
2010	5.88
2011	5.74
2012	5.6
2013	5.45
2014	5.36
2015	5.28
2016	5.21