Year	Cases per 100,000
1990	47.03
1991	45.07
1992	43.16
1993	41.04
1994	39.41
1995	38.42
1996	38.09
1997	37.78
1998	37.36
1999	34.76
2000	33.44
2001	33.39
2002	33.08
2003	32.05
2004	31.66
2005	30.95
2006	29.86
2007	28.69
2008	27.37
2009	26.09
2010	25.01
2011	24.15
2012	23.5
2013	23.03
2014	22.89
2015	22.87
2016	22.79