Year	Percent
1999-01-01	17.2000
2000-01-01	17.2000
2001-01-01	16.9000
2002-01-01	17.9000
2003-01-01	20.9000
2004-01-01	20.5000
2005-01-01	20.4000
2006-01-01	20.1000
2007-01-01	16.8000
2008-01-01	16.3000
2009-01-01	16.3000
2010-01-01	13.0174
2011-01-01	14.9842
2012-01-01	16.1103
2013-01-01	14.6952
2014-01-01	15.2070
2015-01-01	16.1423
2016-01-01	17.9339