Year	Percent
1995	3.898
1996	3.844
1997	4.091
1998	3.866
1999	3.985
2000	4.181
2001	4.439
2002	5.308
2003	5.252
2004	5.216
2005	5.053
2006	5.234
2007	5.173
2008	5.193
2009	5.245
2010	5.195