Year	Percent
1995	10.23
1996	11.49
1997	10.6
1998	13.19
1999	12.61
2000	17.44
2001	16.69
2002	17.53
2003	18.52
2004	18.84
2005	20.54
2006	25.3
2007	22.2
2008	19.93
2009	21.11
2010	19.58