Year	Cases per 100,000
1990	15.35
1991	15.66
1992	15.98
1993	16.31
1994	16.64
1995	16.98
1996	17.2
1997	17.42
1998	17.64
1999	17.87
2000	18.11
2001	18.58
2002	19.08
2003	19.6
2004	20.14
2005	20.71
2006	20.96
2007	21.22
2008	21.49
2009	21.76
2010	22.04
2011	22.2
2012	22.38
2013	22.57
2014	22.76
2015	22.96
2016	23.17