Year	Percent
1998-01-01	23.8000
1999-01-01	17.4000
2000-01-01	16.3000
2001-01-01	15.7000
2002-01-01	14.8000
2003-01-01	13.2000
2004-01-01	12.4000
2005-01-01	10.3000
2006-01-01	10.8000
2007-01-01	10.9000
2008-01-01	11.6000
2009-01-01	12.9000
2010-01-01	14.8252
2011-01-01	14.2437
2012-01-01	15.6536
2013-01-01	17.5697
2014-01-01	21.2927
2015-01-01	24.8348
2016-01-01	19.4113