Year	Percent
2000-01-01	6.05069979292196
2001-01-01	5.53767070374225
2002-01-01	5.65829478325148
2003-01-01	5.50851539125809
2004-01-01	5.06981706432462
2005-01-01	5.13754459943662
2006-01-01	5.69270016609310
2007-01-01	5.51833907411493
2008-01-01	6.06130404027493
2009-01-01	8.49444764765806
2010-01-01	8.57259413608459
2011-01-01	8.63744737355226
2012-01-01	8.31761052798473
2013-01-01	7.94940030000450
2014-01-01	6.36384464233050
2015-01-01	5.45660742759104
2016-01-01	4.92653886685652
2017-01-01	4.43669023677050