Year	Percent
1995	2.507
1996	2.902
1997	3.134
1998	3.593
1999	4.766
2000	4.949
2001	5.16
2002	5.357
2003	5.339
2004	5.37
2005	5.449
2006	5.811
2007	6.037
2008	6.074
2009	6.747
2010	6.74