Year	Percent
1995	4.476
1996	4.503
1997	4.348
1998	4.501
1999	4.864
2000	4.694
2001	4.679
2002	4.814
2003	4.511
2004	4.367
2005	4.46
2006	4.518
2007	5.084
2008	5.749
2009	5.342
2010	5.079