Year	Percent
1995	29.68
1996	30.84
1997	28.39
1998	28.07
1999	38.87
2000	37.07
2001	31.93
2002	29.32
2003	28.08
2004	28.75
2005	32.16
2006	31.66
2007	32.17
2008	26.98
2009	24.87
2010	24.8