Year	Cases per 100,000
1990	19.04
1991	19.61
1992	19.91
1993	20.29
1994	21.42
1995	21.83
1996	22.07
1997	23.02
1998	24.21
1999	25.68
2000	27.63
2001	28.31
2002	29.28
2003	29.79
2004	30.22
2005	30.14
2006	30.26
2007	30.18
2008	30.03
2009	30.24
2010	30.39
2011	29.93
2012	29.62
2013	28.83
2014	28.28
2015	27.79
2016	27.37