Year	Percent
2000-01-01	2.95000173102870
2001-01-01	2.31199273590407
2002-01-01	1.73228645386238
2003-01-01	2.09489221113563
2004-01-01	2.20968783302264
2005-01-01	2.49240441080451
2006-01-01	2.35396691218685
2007-01-01	2.17017221109525
2008-01-01	1.96376591376206
2009-01-01	2.35180264839658
2010-01-01	2.93093253285680
2011-01-01	2.47337820729848
2012-01-01	2.49584222763649
2013-01-01	2.16058456327434
2014-01-01	2.50761493749372
2015-01-01	2.78935345166271
2016-01-01	2.76969971406109
2017-01-01	2.45162053880592