Year	Percent
2000-01-01	7.79736287253552
2001-01-01	8.21708461138696
2002-01-01	8.11178474810805
2003-01-01	7.98076540354727
2004-01-01	8.28841738955060
2005-01-01	8.71113073843996
2006-01-01	9.14988416266168
2007-01-01	9.50721399193758
2008-01-01	9.59153828733500
2009-01-01	10.06789220701720
2010-01-01	9.77619956870441
2011-01-01	9.51297064085179
2012-01-01	9.29574419803807
2013-01-01	9.24467053709268
2014-01-01	8.59879005731937
2015-01-01	8.84986590286856
2016-01-01	8.84573190874653
2017-01-01	9.00507403812007