Year	Cases per 100,000
1990	26.52
1991	26.46
1992	26.63
1993	26.77
1994	26.99
1995	27.18
1996	27.33
1997	27.62
1998	27.92
1999	27.69
2000	27.17
2001	26.47
2002	25.71
2003	24.93
2004	23.95
2005	23.27
2006	22.66
2007	21.92
2008	21.16
2009	20.54
2010	20.05
2011	19.59
2012	19.25
2013	18.97
2014	18.71
2015	18.46
2016	18.18