Year	Percent
1995	14.27
1996	20.89
1997	21.11
1998	22.34
1999	21.04
2000	23.01
2001	23.15
2002	23.63
2003	34.42
2004	32.42
2005	26.22
2006	25.5
2007	24.95
2008	21.94
2009	28.17
2010	28.3