Year	Percent
1998-01-01	49.9000
1999-01-01	40.3000
2000-01-01	35.5000
2001-01-01	36.5000
2002-01-01	24.5000
2003-01-01	29.9000
2004-01-01	80.2000
2005-01-01	79.3000
2006-01-01	79.3000
2007-01-01	79.5000
2008-01-01	26.4000
2009-01-01	25.6000
2010-01-01	25.7679
2011-01-01	23.7104
2012-01-01	23.8772
2013-01-01	24.3888
2014-01-01	23.6865
2015-01-01	23.4387