Year	Percent
1995	13.48
1996	12.36
1997	11.35
1998	11.73
1999	11.87
2000	11.66
2001	11.93
2002	12.37
2003	12.34
2004	12.36
2005	11.83
2006	12.45
2007	9.522
2008	9.687
2009	7.783
2010	9.281