Year	Cases per 100,000
1990	31.68
1991	30.69
1992	29.85
1993	28.81
1994	27.46
1995	26.67
1996	26.22
1997	25.11
1998	25.02
1999	23.57
2000	23.54
2001	21.62
2002	20.58
2003	19.86
2004	19.14
2005	18.52
2006	18.5
2007	17.82
2008	18.06
2009	17.99
2010	18.34
2011	18.59
2012	18.6
2013	18.46
2014	19.44
2015	19.56
2016	19.86