Year	Percent
1995	11.51
1996	13.95
1997	14.69
1998	14.2
1999	9.885
2000	9.153
2001	8.412
2002	8.751
2003	8.743
2004	10.18
2005	9.328
2006	10.44
2007	7.382
2008	8.316
2009	11.28
2010	11.42