Year	Cases per 100,000
1990	44.11
1991	43.09
1992	41.93
1993	40.54
1994	39.05
1995	37.85
1996	36.52
1997	35.18
1998	33.87
1999	32.74
2000	31.42
2001	30.19
2002	29.12
2003	28.24
2004	27.62
2005	27.02
2006	26.43
2007	25.84
2008	25.23
2009	24.56
2010	24.03
2011	23.41
2012	23.31
2013	23.03
2014	22.85
2015	22.77
2016	22.7