Year	Cases per 100,000
1990	16.98
1991	17.01
1992	17.06
1993	17.1
1994	17.14
1995	17.19
1996	17.56
1997	17.94
1998	18.34
1999	18.74
2000	19.16
2001	19.55
2002	19.95
2003	20.36
2004	20.78
2005	21.21
2006	21.51
2007	21.82
2008	22.13
2009	22.45
2010	22.78
2011	22.75
2012	22.72
2013	22.69
2014	22.66
2015	22.63
2016	22.61