Year	Percent
1995	5.566
1996	5.651
1997	5.594
1998	5.667
1999	5.826
2000	7.477
2001	7.401
2002	8.263
2003	7.664
2004	8.201
2005	7.942
2006	7.748
2007	7.13
2008	6.806
2009	7.91
2010	7.771