Year	Percent
1995	4.262
1996	4.148
1997	4.118
1998	4.493
1999	4.197
2000	4.683
2001	4.622
2002	4.538
2003	4.448
2004	4.289
2005	4.359
2006	4.514
2007	4.432
2008	4.225
2009	4.771
2010	4.754