Year	Percent
1995	4.987
1996	5.01
1997	4.516
1998	5.631
1999	5.136
2000	5.402
2001	5.057
2002	5.018
2003	5.247
2004	4.966
2005	5.929
2006	14.34
2007	16.53
2008	15.68
2009	15.33
2010	17.67