Year	Percent
1998-01-01	37.9000
1999-01-01	44.2000
2000-01-01	132.1000
2001-01-01	107.1000
2002-01-01	106.2000
2003-01-01	131.8000
2004-01-01	182.9000
2005-01-01	17.6000
2006-01-01	17.6000
2007-01-01	18.3000
2008-01-01	22.8000
2009-01-01	23.3000
2010-01-01	23.8777
2011-01-01	24.0256
2012-01-01	25.9653
2013-01-01	25.8070
2014-01-01	24.6674
2015-01-01	23.7467
2016-01-01	24.3837