Year	Cases per 100,000
1990	27.91
1991	28.57
1992	29.5
1993	30.45
1994	31.98
1995	32.75
1996	33.86
1997	34.68
1998	35.09
1999	34.79
2000	34.32
2001	33.91
2002	33.67
2003	33.42
2004	32.94
2005	32.61
2006	32.26
2007	31.71
2008	30.99
2009	30.28
2010	29.61
2011	28.9
2012	28.57
2013	28.38
2014	28.18
2015	27.95
2016	27.71