Year	Cases per 100,000
1990	26.47
1991	26.84
1992	27.24
1993	27.64
1994	28.05
1995	28.48
1996	28.24
1997	28.02
1998	27.81
1999	27.6
2000	27.41
2001	26.81
2002	26.25
2003	25.71
2004	25.18
2005	24.68
2006	24.48
2007	24.26
2008	24.07
2009	23.88
2010	23.7
2011	23.54
2012	23.4
2013	23.25
2014	23.11
2015	22.97
2016	22.84