Year	Percent
1996-01-01	4.8403300000000010
1997-01-01	4.4025200000000000
1998-01-01	3.2147099999999997
1999-01-01	3.5028000000000000
2000-01-01	2.9833100000000000
2001-01-01	3.1910200000000000
2002-01-01	4.1167900000000000
2003-01-01	4.7780100000000000
2004-01-01	5.0516300000000000
2005-01-01	4.2145199999999990
2006-01-01	4.3193500000000000
2007-01-01	3.9987600000000000
2008-01-01	5.0298500000000000
2009-01-01	3.6407500000000000