Year	Cases per 100,000
1990	22.65
1991	22.16
1992	21.91
1993	22.13
1994	22.14
1995	22.38
1996	21.83
1997	21.7
1998	21.41
1999	20.43
2000	20.32
2001	20.13
2002	19.72
2003	19.28
2004	19.31
2005	19.64
2006	19.4
2007	19.49
2008	19.51
2009	20.07
2010	19.96
2011	20.37
2012	20.98
2013	21.79
2014	22.21
2015	22.72
2016	23.11