Year	Percent
1995	5.374
1996	5.584
1997	5.739
1998	6.078
1999	6.203
2000	6.458
2001	6.26
2002	6.396
2003	6.486
2004	5.673
2005	5.834
2006	6.196
2007	6.224
2008	6.599
2009	7.541
2010	7.04