Year	Cases per 100,000
1990	37.42
1991	37.27
1992	37.4
1993	37.35
1994	37.53
1995	37.29
1996	36.61
1997	36.79
1998	36.42
1999	35.67
2000	35.24
2001	33.92
2002	36.12
2003	35.28
2004	34.4
2005	33.35
2006	32.26
2007	31.54
2008	31.04
2009	30.42
2010	29.97
2011	29.49
2012	29.03
2013	28.63
2014	28.26
2015	27.87
2016	27.53