Year	Cases per 100,000
1990	26.65
1991	25.62
1992	25.06
1993	24.51
1994	24.05
1995	23.33
1996	22.57
1997	21.74
1998	20.32
1999	19.44
2000	18.56
2001	17.78
2002	17.04
2003	15.93
2004	15.43
2005	15.09
2006	14.94
2007	14.93
2008	14.76
2009	14.99
2010	15.28
2011	15.26
2012	14.87
2013	14.71
2014	14.99
2015	14.8
2016	14.78