Year	Percent
1998-01-01	7.00000
1999-01-01	7.50000
2000-01-01	6.50000
2001-01-01	9.70000
2002-01-01	9.90000
2003-01-01	6.60000
2004-01-01	7.00000
2005-01-01	6.10000
2006-01-01	6.10000
2007-01-01	5.50000
2008-01-01	4.40000
2009-01-01	5.40000
2010-01-01	5.36612
2011-01-01	5.09957
2012-01-01	5.50896
2013-01-01	6.34549
2014-01-01	5.62132
2015-01-01	6.83823
2016-01-01	7.02517