Year	Percent
1995	3.362
1996	3.952
1997	3.75
1998	3.995
1999	3.799
2000	3.368
2001	3.525
2002	3.58
2003	3.848
2004	4.098
2005	3.987
2006	4.856
2007	6.025
2008	6.905
2009	7.326
2010	6.315