Year	Cases per 100,000
1990	16.99
1991	17.51
1992	18.6
1993	20.23
1994	21.53
1995	23.08
1996	23.82
1997	24.64
1998	25.34
1999	26
2000	26.55
2001	27.67
2002	27.73
2003	27.64
2004	27.34
2005	27.71
2006	26.5
2007	25.01
2008	24.04
2009	23.33
2010	22.09
2011	22.16
2012	22.31
2013	22.64
2014	23.24
2015	23.44
2016	23.68