Year	Cases per 100,000
1990	47.97
1991	49.31
1992	50.46
1993	50.1
1994	50.04
1995	50.54
1996	47.74
1997	43.69
1998	39.78
1999	39.38
2000	38.75
2001	37.3
2002	36.21
2003	35.78
2004	36.02
2005	36.33
2006	34.7
2007	35.48
2008	35.46
2009	31.82
2010	30.14
2011	28.98
2012	29.46
2013	29.15
2014	27.73
2015	27.51
2016	27.39