Year	Percent
1995	5.173
1996	5.433
1997	5.206
1998	6.426
1999	6.008
2000	5.708
2001	5.685
2002	5.524
2003	5.241
2004	5.423
2005	5.265
2006	5.764
2007	5.538
2008	5.386
2009	5.927
2010	5.806