Year	Percent
1995	12.99
1996	14.2
1997	14.05
1998	14.69
1999	13.48
2000	12.27
2001	12.4
2002	12.27
2003	11.92
2004	12.96
2005	15.54
2006	16.14
2007	21.73
2008	14.15
2009	11.22
2010	11.23