Year	Cases per 100,000
1990	48.95
1991	47.75
1992	46.34
1993	44.87
1994	44.02
1995	44.44
1996	46.13
1997	46.55
1998	45.3
1999	44.06
2000	42.98
2001	42.48
2002	41.46
2003	40.18
2004	39.67
2005	39.44
2006	37.37
2007	35.67
2008	35.11
2009	34.68
2010	33.46
2011	31.58
2012	29.34
2013	27.96
2014	27.69
2015	27.89
2016	28.31