Year	Percent
1995	12.59
1996	12.49
1997	12.72
1998	15.25
1999	16.41
2000	16.6
2001	15.83
2002	15.16
2003	14.77
2004	15.32
2005	14.92
2006	15.35
2007	15.93
2008	16.63
2009	17.19
2010	15.78