Year	Percent
1998-01-01	17.0000
1999-01-01	16.4000
2000-01-01	14.0000
2001-01-01	14.2000
2002-01-01	13.1000
2003-01-01	11.7000
2004-01-01	11.7000
2005-01-01	10.1000
2006-01-01	10.2000
2007-01-01	11.1000
2008-01-01	11.0000
2009-01-01	13.7000
2010-01-01	13.9126
2011-01-01	16.5337
2012-01-01	16.7367
2013-01-01	18.0519
2014-01-01	19.7096
2015-01-01	21.8231
2016-01-01	20.1288