Year	Percent
1995	10.43
1996	10.15
1997	9.964
1998	10.15
1999	9.499
2000	9.898
2001	10.38
2002	11.86
2003	10.55
2004	9.747
2005	6.539
2006	7.228
2007	5.003
2008	4.719
2009	7.28
2010	8.527