Year	Percent
2000-01-01	3.96791934477782
2001-01-01	3.60851257460917
2002-01-01	2.96910979982926
2003-01-01	3.13141316814932
2004-01-01	3.22028184995649
2005-01-01	3.39286494252891
2006-01-01	3.18363513992335
2007-01-01	3.10890949711868
2008-01-01	3.03229886807082
2009-01-01	3.55551913452683
2010-01-01	3.46539407026597
2011-01-01	3.15657072073433
2012-01-01	2.94705826609322
2013-01-01	2.90963149181196
2014-01-01	3.26305223277935
2015-01-01	3.24016205187264
2016-01-01	3.38368804028021
2017-01-01	3.49028076725034