Year	Percent
1995	4.301
1996	4.518
1997	4.533
1998	4.682
1999	5.264
2000	5.131
2001	4.939
2002	5.01
2003	5.523
2004	6.111
2005	6.693
2006	6.252
2007	6.326
2008	5.936
2009	6.593
2010	6.739