Year	Cases per 100,000
1990	29.43
1991	28.33
1992	27.06
1993	26.73
1994	26.83
1995	27.33
1996	26.93
1997	25.56
1998	24.76
1999	24.06
2000	23.46
2001	23.36
2002	23.2
2003	23
2004	23.06
2005	22.67
2006	22.55
2007	22.25
2008	21.9
2009	22.12
2010	22.31
2011	22.01
2012	21.71
2013	21.68
2014	21.22
2015	20.97
2016	20.86