Year	Percent
1995	34.95
1996	35.1
1997	31.86
1998	33.25
1999	41.17
2000	39.18
2001	31.93
2002	27.82
2003	29
2004	30.48
2005	27.4
2006	26.39
2007	29.87
2008	27.19
2009	27.87
2010	26.49