Year	Cases per 100,000
1990	19.04
1991	15.79
1992	18.54
1993	19.86
1994	21.43
1995	22.35
1996	23.08
1997	23.22
1998	23.47
1999	23.6
2000	23.7
2001	23.68
2002	23.77
2003	24.59
2004	26.01
2005	26.92
2006	27.45
2007	27.29
2008	26.6
2009	25.94
2010	24.82
2011	23.92
2012	22.8
2013	20.84
2014	19.72
2015	19.1
2016	19.08