Year	Cases per 100,000
1990	50.87
1991	46.74
1992	43.8
1993	41.3
1994	38.63
1995	36.3
1996	34.96
1997	33.73
1998	31.9
1999	33.47
2000	34.66
2001	36.33
2002	37.68
2003	38.65
2004	39.99
2005	40.74
2006	41.46
2007	41.59
2008	41.12
2009	40.62
2010	40.2
2011	40.18
2012	40.01
2013	40.06
2014	40.13
2015	40.21
2016	40.41