Year	Cases per 100,000
1990	15.18
1991	15.32
1992	15.47
1993	15.63
1994	15.78
1995	15.94
1996	16.4
1997	16.87
1998	17.36
1999	17.87
2000	18.4
2001	18.95
2002	19.53
2003	20.12
2004	20.74
2005	21.38
2006	21.75
2007	22.11
2008	22.49
2009	22.88
2010	23.28
2011	23.53
2012	23.79
2013	24.05
2014	24.32
2015	24.59
2016	24.87