Year	Cases per 100,000
1990	16.8
1991	16.78
1992	16.75
1993	16.74
1994	16.72
1995	16.71
1996	16.79
1997	16.87
1998	16.95
1999	17.04
2000	17.13
2001	17.22
2002	17.32
2003	17.43
2004	17.54
2005	17.65
2006	18.03
2007	18.41
2008	18.81
2009	19.21
2010	19.63
2011	20.26
2012	20.9
2013	21.57
2014	22.27
2015	22.98
2016	23.73