Year	Cases per 100,000
1990	21.8
1991	22.38
1992	22.98
1993	23.6
1994	24.24
1995	24.9
1996	24.72
1997	24.54
1998	24.36
1999	24.19
2000	24.02
2001	24.48
2002	24.95
2003	25.44
2004	25.94
2005	26.45
2006	26.53
2007	26.62
2008	26.74
2009	26.87
2010	27.02
2011	26.57
2012	26.14
2013	25.71
2014	25.29
2015	24.89
2016	24.49