Year	Cases per 100,000
1990	25.91
1991	25.41
1992	24.93
1993	24.62
1994	24.02
1995	23.77
1996	23.19
1997	22.82
1998	22.38
1999	21.94
2000	21.56
2001	21.22
2002	20.92
2003	20.75
2004	20.54
2005	20.45
2006	20.39
2007	20.32
2008	20.28
2009	20.26
2010	20.29
2011	20.32
2012	20.32
2013	20.34
2014	20.35
2015	20.39
2016	20.46