Year	Percent
1995	5.783
1996	6.085
1997	6.23
1998	6.291
1999	6.429
2000	5.96
2001	6.098
2002	6.229
2003	6.131
2004	6.5
2005	6.333
2006	6.772
2007	6.979
2008	6.602
2009	6.603
2010	6.685