Year	Cases per 100,000
1990	53.86
1991	54.42
1992	55.18
1993	56.51
1994	55.71
1995	55.24
1996	53.41
1997	51.31
1998	49.98
1999	48.55
2000	46.18
2001	44.76
2002	44.19
2003	42.01
2004	41.59
2005	40.6
2006	38.66
2007	36.28
2008	35.75
2009	34.88
2010	34.1
2011	33.35
2012	31.06
2013	29.5
2014	28.16
2015	27.85
2016	27.67