Year	Cases per 100,000
1990	18.32
1991	18.63
1992	18.95
1993	19.29
1994	19.62
1995	19.98
1996	20.12
1997	20.27
1998	20.42
1999	20.57
2000	20.75
2001	20.54
2002	20.35
2003	20.17
2004	19.98
2005	19.82
2006	19.75
2007	19.67
2008	19.61
2009	19.54
2010	19.5
2011	19.42
2012	19.36
2013	19.3
2014	19.25
2015	19.19
2016	19.15