Year	Percent
1995	5.409
1996	5.415
1997	5.094
1998	5.071
1999	5.348
2000	5.484
2001	5.095
2002	4.995
2003	4.722
2004	4.394
2005	4.355
2006	5.286
2007	5.417
2008	4.955
2009	5.158
2010	6.661