Year	Cases per 100,000
1990	31.36
1991	31.4
1992	31.24
1993	31.21
1994	31.05
1995	31.16
1996	31.35
1997	31.96
1998	32.1
1999	31.74
2000	31.36
2001	31.57
2002	31.68
2003	31.45
2004	30.69
2005	30.36
2006	30.25
2007	29.91
2008	29.53
2009	28.4
2010	28.14
2011	28.18
2012	28
2013	28.4
2014	28.1
2015	27.59
2016	27.1