Year	Percent
1995	14.64
1996	14.45
1997	14.66
1998	15
1999	14.8
2000	14.51
2001	13.85
2002	13.45
2003	13.65
2004	13.4
2005	13.32
2006	12.89
2007	12.91
2008	12.7
2009	12.26
2010	11.8