Year	Percent
1995	6.448
1996	5.812
1997	5.794
1998	5.778
1999	5.699
2000	6.272
2001	5.954
2002	5.409
2003	5.565
2004	5.491
2005	4.86
2006	4.177
2007	3.882
2008	3.768
2009	4.594
2010	4.404