Year	Cases per 100,000
1990	15.34
1991	15.43
1992	15.52
1993	15.61
1994	15.7
1995	15.8
1996	16.21
1997	16.63
1998	17.06
1999	17.51
2000	17.98
2001	18.26
2002	18.56
2003	18.86
2004	19.16
2005	19.48
2006	19.07
2007	18.67
2008	18.29
2009	17.92
2010	17.57
2011	17.7
2012	17.83
2013	17.97
2014	18.1
2015	18.24
2016	18.38