Year	Percent
1995	13.74
1996	14.33
1997	16.24
1998	19.04
1999	15.1
2000	14.76
2001	12.26
2002	13.45
2003	16.19
2004	16.05
2005	14.72
2006	15.44
2007	13.71
2008	13.63
2009	12.51
2010	12.94