Year	Cases per 100,000
1990	27.26
1991	27.76
1992	28.29
1993	28.83
1994	29.39
1995	29.98
1996	29.75
1997	29.55
1998	29.36
1999	29.17
2000	29.01
2001	28.31
2002	27.66
2003	27.03
2004	26.41
2005	25.83
2006	25.3
2007	24.77
2008	24.26
2009	23.77
2010	23.31
2011	23.09
2012	22.88
2013	22.68
2014	22.48
2015	22.28
2016	22.11