Year	Cases per 100,000
1990	16.07
1991	16.13
1992	16.19
1993	16.25
1994	16.31
1995	16.38
1996	16.34
1997	16.3
1998	16.26
1999	16.22
2000	16.18
2001	16.31
2002	16.43
2003	16.57
2004	16.7
2005	16.85
2006	17.13
2007	17.42
2008	17.71
2009	18.01
2010	18.32
2011	18.9
2012	19.49
2013	20.1
2014	20.74
2015	21.39
2016	22.07