Year	Cases per 100,000
1990	26.56
1991	24.92
1992	23.65
1993	22.88
1994	22.88
1995	23.94
1996	24.19
1997	24.09
1998	24.51
1999	22.97
2000	22.3
2001	21.58
2002	21.28
2003	20.27
2004	18.92
2005	18.17
2006	17.36
2007	16.9
2008	16.64
2009	16.43
2010	16.31
2011	16.34
2012	16.27
2013	16.46
2014	16.59
2015	16.69
2016	16.97