Year	Percent
1995	5.971
1996	6.321
1997	6.335
1998	6.337
1999	6.509
2000	7.097
2001	5.371
2002	5.236
2003	6.332
2004	6.487
2005	8.151
2006	7.405
2007	6.819
2008	7.821
2009	6.359
2010	6.331