Year	Percent
2000-01-01	2.69322183484253
2001-01-01	2.37386086860603
2002-01-01	1.94169615956130
2003-01-01	2.32278833211319
2004-01-01	2.38081707384487
2005-01-01	2.56623829379477
2006-01-01	2.19164918839325
2007-01-01	2.14290254713117
2008-01-01	2.06434674347979
2009-01-01	2.46142527937931
2010-01-01	2.78149129854896
2011-01-01	2.62711905574641
2012-01-01	2.41534450619055
2013-01-01	2.24102209350806
2014-01-01	2.88786113725282
2015-01-01	2.87627381231107
2016-01-01	2.87972440885611
2017-01-01	2.93526505245505