Year	Percent
1995	5.476
1996	5.876
1997	5.605
1998	5.906
1999	5.735
2000	5.521
2001	5.859
2002	6.337
2003	6.242
2004	6.204
2005	6.214
2006	6.201
2007	6.43
2008	7.002
2009	7.35
2010	7.461