Year	Percent
2003-01-01	3.83517527298986
2004-01-01	4.01538736681159
2005-01-01	4.02535895424465
2006-01-01	4.04182159260319
2007-01-01	3.73264698387038
2008-01-01	3.44717922029439
2009-01-01	4.44834066569493
2010-01-01	4.45425755158764
2011-01-01	4.32430569962853
2012-01-01	4.82275566377647
2013-01-01	4.92662111950762