Year	Percent
1995	14.3
1996	14.31
1997	14.23
1998	14.24
1999	11.87
2000	10.91
2001	10.93
2002	11.17
2003	9.586
2004	10.16
2005	11.6
2006	12.07
2007	13.35
2008	15.59
2009	18.62
2010	18.61