Year	Percent
2000-01-01	3.68472212497875
2001-01-01	3.29637098318668
2002-01-01	2.69189744711169
2003-01-01	2.86653785349680
2004-01-01	2.95554310627518
2005-01-01	3.12888864154843
2006-01-01	2.93214695440122
2007-01-01	2.83490408266778
2008-01-01	2.75083475585396
2009-01-01	3.24035186592720
2010-01-01	3.32197918649611
2011-01-01	2.99709375482617
2012-01-01	2.81933710445179
2013-01-01	2.68580657879989
2014-01-01	3.04142384792888
2015-01-01	3.09178050022608
2016-01-01	3.17953519890223
2017-01-01	3.22820034528222