Year	Percent
1995	11.48
1996	11.32
1997	8.321
1998	8.414
1999	10.36
2000	10.61
2001	10.71
2002	10.94
2003	11.68
2004	26.23
2005	25.6
2006	31.68
2007	33.15
2008	32.24
2009	34.31
2010	34.15