Year	Cases per 100,000
1990	54.2
1991	53.8
1992	53.32
1993	52.83
1994	52.27
1995	51.81
1996	51.27
1997	51.07
1998	50.82
1999	50.52
2000	50.21
2001	50.25
2002	50.44
2003	50.33
2004	50.4
2005	50.44
2006	50.25
2007	50.04
2008	50.03
2009	50.08
2010	50.22
2011	50.38
2012	50.61
2013	50.97
2014	51.18
2015	51.48
2016	51.79