Year	Cases per 100,000
1990	38.67
1991	38.53
1992	38.04
1993	36.57
1994	36.26
1995	35
1996	32.88
1997	30.66
1998	28.45
1999	26.47
2000	25.05
2001	24.85
2002	22.63
2003	21.59
2004	20.98
2005	20.24
2006	19.59
2007	19.35
2008	20.46
2009	20.46
2010	20.04
2011	19.61
2012	19.52
2013	21.49
2014	20.83
2015	20.75
2016	20.65