Year	Cases per 100,000
1990	79.71
1991	79.2
1992	78.63
1993	78.87
1994	78.92
1995	77.86
1996	77.54
1997	76.04
1998	75.61
1999	75.06
2000	73.78
2001	71.44
2002	70.21
2003	70.29
2004	67.07
2005	65.75
2006	65.81
2007	65.1
2008	64.31
2009	64.16
2010	63.24
2011	62.36
2012	61.27
2013	59.33
2014	58.93
2015	58.64
2016	58.48