Year	Percent
1999-01-01	4.1912500000000000
2000-01-01	3.5748699999999998
2001-01-01	3.7016800000000000
2002-01-01	3.8349500000000000
2003-01-01	4.9227400000000000
2004-01-01	4.7372300000000000
2005-01-01	4.4093500000000000
2006-01-01	4.1323500000000000
2007-01-01	3.9114400000000002
2008-01-01	3.1703000000000000