Year	Cases per 100,000
1990	21.98
1991	22.21
1992	22.45
1993	22.69
1994	22.93
1995	23.18
1996	23.39
1997	23.61
1998	23.83
1999	24.06
2000	24.29
2001	24.55
2002	24.81
2003	25.08
2004	25.35
2005	25.63
2006	25.49
2007	25.36
2008	25.23
2009	25.11
2010	24.99
2011	24.65
2012	24.33
2013	24
2014	23.69
2015	23.38
2016	23.09