Year	Percent
1995	2.799
1996	3.155
1997	3.372
1998	3.185
1999	3.199
2000	3.715
2001	3.832
2002	3.849
2003	3.526
2004	3.646
2005	3.697
2006	3.954
2007	4.137
2008	4.494
2009	4.178
2010	3.769