Year	Percent
1995	4.96
1996	5.404
1997	5.118
1998	5.558
1999	5.375
2000	5.378
2001	5.304
2002	5.316
2003	5.933
2004	5.489
2005	5.845
2006	6.34
2007	5.983
2008	6.573
2009	6.718
2010	6.609