Year	Percent
1995	12.1
1996	12.79
1997	13.46
1998	13.42
1999	13.29
2000	13.13
2001	10.27
2002	11.09
2003	11.34
2004	10.72
2005	12.53
2006	11.06
2007	13.14
2008	12.13
2009	12.13
2010	12.13