Year	Percent
1995	6.871
1996	6.313
1997	5.54
1998	6.868
1999	5.988
2000	4.677
2001	4.786
2002	5.434
2003	5.428
2004	5.573
2005	5.822
2006	6.421
2007	6.575
2008	5.703
2009	6.409
2010	6.18