Year	Percent
1995	5.246
1996	4.715
1997	4.004
1998	4.213
1999	3.549
2000	3.397
2001	4.603
2002	3.752
2003	3.962
2004	3.873
2005	4.667
2006	4.213
2007	4.379
2008	4.169
2009	4.298
2010	4.353