Year	Percent
1995	16.14
1996	14.53
1997	21
1998	19.65
1999	18.86
2000	21.32
2001	10.64
2002	10.91
2003	10.37
2004	11.49
2005	12.69
2006	12.64
2007	11.58
2008	13.54
2009	14.7
2010	15.11