Year	Cases per 100,000
1990	28.99
1991	28.33
1992	27.69
1993	27.07
1994	26.47
1995	25.9
1996	24.26
1997	22.75
1998	21.33
1999	20.01
2000	18.78
2001	18.93
2002	19.08
2003	19.24
2004	19.4
2005	19.57
2006	19.49
2007	19.4
2008	19.32
2009	19.24
2010	19.18
2011	19.21
2012	19.26
2013	19.3
2014	19.35
2015	19.39
2016	19.45