Year	Percent
1995	15.36
1996	15.54
1997	15.26
1998	14.4
1999	15
2000	15.15
2001	14.96
2002	14.54
2003	16.04
2004	15.66
2005	15.31
2006	14.36
2007	13.9
2008	14.4
2009	12.33
2010	15.16