Year	Percent
1995	3.494
1996	3.67
1997	4.769
1998	4.606
1999	5.133
2000	5.209
2001	5.381
2002	5.659
2003	5.335
2004	5.462
2005	5.498
2006	5.099
2007	5.243
2008	5.44
2009	5.641
2010	5.578