Year	Percent
1995	8.276
1996	8.609
1997	9.261
1998	9.308
1999	9.359
2000	9.654
2001	9.902
2002	9.716
2003	9.293
2004	9.264
2005	8.723
2006	8.188
2007	8.397
2008	8.496
2009	9.597
2010	8.041