Year	Percent
1998-01-01	42.8000
1999-01-01	48.1000
2000-01-01	48.6000
2001-01-01	48.6000
2002-01-01	48.6000
2003-01-01	48.6000
2004-01-01	48.6000
2005-01-01	47.4000
2006-01-01	46.0000
2007-01-01	49.4000
2008-01-01	46.1000
2009-01-01	40.0000
2010-01-01	40.2927
2011-01-01	40.2025
2012-01-01	39.9604
2013-01-01	42.6210
2014-01-01	45.0806
2015-01-01	45.1359
2016-01-01	51.2255