Year	Percent
1995	3.031
1996	2.955
1997	3.149
1998	3.103
1999	3.368
2000	3.244
2001	3.288
2002	3.34
2003	3.864
2004	3.969
2005	3.929
2006	3.754
2007	3.321
2008	3.579
2009	4.237
2010	4.302