Year	Cases per 100,000
1990	18.36
1991	18.51
1992	18.69
1993	18.88
1994	19.07
1995	19.29
1996	19.48
1997	19.7
1998	19.92
1999	20.16
2000	20.42
2001	20.82
2002	21.25
2003	21.71
2004	22.19
2005	22.72
2006	22.56
2007	22.4
2008	22.25
2009	22.1
2010	21.97
2011	22.64
2012	23.36
2013	24.11
2014	24.9
2015	25.73
2016	26.63