Year	Cases per 100,000
1990	27.03
1991	26.53
1992	26.1
1993	25.72
1994	25.37
1995	25.08
1996	24.83
1997	24.65
1998	24.5
1999	24.39
2000	24.34
2001	23.67
2002	23.09
2003	22.56
2004	22.09
2005	21.67
2006	21.4
2007	21.15
2008	20.92
2009	20.71
2010	20.51
2011	20.87
2012	21.26
2013	21.67
2014	22.11
2015	22.59
2016	23.17