Year	Percent
1995	3.934
1996	4.084
1997	4.081
1998	4.103
1999	4.363
2000	4.331
2001	4.525
2002	5.064
2003	5.4
2004	5.705
2005	5.401
2006	5.829
2007	5.724
2008	5.818
2009	5.662
2010	5.664