Year	Percent
1995	34.6
1996	33.17
1997	31.9
1998	31.52
1999	26.73
2000	29.25
2001	24.31
2002	24.29
2003	16.85
2004	16.85
2005	12.93
2006	12.96
2007	15.07
2008	15.07
2009	20.38
2010	18.5