Year	Cases per 100,000
1990	65.45
1991	64.88
1992	64.57
1993	64.48
1994	63.31
1995	62.73
1996	62
1997	60.84
1998	59.89
1999	58.73
2000	57.28
2001	55.81
2002	55.42
2003	54.81
2004	53.85
2005	53.3
2006	52.79
2007	52.37
2008	52.21
2009	52.06
2010	51.34
2011	51.16
2012	50.93
2013	50.62
2014	49.73
2015	48.99
2016	48.46
