Year	Percent
2000-01-01	5.93053359458058
2001-01-01	5.43345590306059
2002-01-01	4.42589401416380
2003-01-01	4.45619039101599
2004-01-01	4.15267617868403
2005-01-01	3.18557033576184
2006-01-01	2.64154471847871
2007-01-01	1.75652980046468
2008-01-01	2.43406932105465
2009-01-01	4.86848882249034
2010-01-01	6.69652226877743
2011-01-01	5.54652116161582
2012-01-01	4.33225076217435
2013-01-01	3.87231562239371