Year	Percent
1995	3.633
1996	3.612
1997	3.772
1998	3.47
1999	3.507
2000	3.847
2001	3.834
2002	3.922
2003	4.049
2004	4.02
2005	3.73
2006	3.779
2007	4.101
2008	3.952
2009	3.984
2010	3.978