Year	Percent
1995	7.563
1996	7.195
1997	7.517
1998	7.581
1999	10.21
2000	14.93
2001	15.75
2002	14.47
2003	15.78
2004	15.19
2005	15.08
2006	14.87
2007	15.88
2008	15.95
2009	15.98
2010	15.59