Year	Cases per 100,000
1990	82.29
1991	81.08
1992	79.84
1993	78.87
1994	76.92
1995	74.9
1996	72.63
1997	70.47
1998	69.11
1999	67.99
2000	66.94
2001	65.55
2002	64.26
2003	62.79
2004	61.52
2005	60.36
2006	58.38
2007	56.76
2008	55.45
2009	54.1
2010	53.22
2011	52.82
2012	52.78
2013	52.98
2014	53.19
2015	53.03
2016	53.21