Year	Percent
1998-01-01	12.70000
1999-01-01	19.00000
2000-01-01	17.50000
2001-01-01	16.20000
2002-01-01	18.10000
2003-01-01	17.80000
2004-01-01	14.70000
2005-01-01	14.70000
2006-01-01	14.70000
2007-01-01	23.40000
2008-01-01	21.90000
2009-01-01	4.10000
2010-01-01	1.75475
2011-01-01	17.90910
2012-01-01	18.25340
2013-01-01	17.11540
2014-01-01	17.20710
2015-01-01	17.73730
2016-01-01	14.78160