Year	Percent
1995-01-01	16.7043621005336
1996-01-01	16.6100127113963
1997-01-01	16.1067617782252
1998-01-01	15.6853347822611
1999-01-01	15.3845019070000
2000-01-01	15.2498839704730
2001-01-01	14.9414730009753
2002-01-01	14.0885839233867
2003-01-01	13.6184416880167
2004-01-01	13.4579536172900
2005-01-01	13.7160767866468
2006-01-01	13.8407966140056
2007-01-01	13.4164021326642
2008-01-01	13.3116786073762
2009-01-01	13.5430822215947
2010-01-01	13.5337656303216
2011-01-01	13.5980513944851
2012-01-01	13.3600807181795
2013-01-01	13.3046508648239
2014-01-01	13.8036701672003
2015-01-01	13.5681091130297
2016-01-01	13.4852133743105
2017-01-01	13.0073638628479