Year	Percent
1995	24.75
1996	30.32
1997	33.47
1998	31.25
1999	25.34
2000	16.19
2001	16.15
2002	36.1
2003	23.06
2004	15.66
2005	15.93
2006	15.38
2007	16.16
2008	15.3
2009	10.59
2010	10.03