Year	Rate
1990	14.5
1991	14.2
1992	13.2
1993	13.3
1994	11.1
1995	8.5
1996	7.4
1997	6
1998	5.1
1999	5
2000	5
2001	5
2002	4.8
2003	4.9
2004	4.6
2005	4.5
2006	4.8
2007	4.2
2008	4.3
2009	4
2010	4.5
2011	3.9
2012	3.5
2013	3
2014	2.7