Year	Percent
1995	30.41
1996	31.9
1997	36.61
1998	54.17
1999	53.32
2000	55.93
2001	55.15
2002	56.12
2003	54.6
2004	58.28
2005	56.71
2006	58.15
2007	58.48
2008	54.16
2009	54.65
2010	52.53