Year	Percent
1998-01-01	9.30000
1999-01-01	8.20000
2000-01-01	7.40000
2001-01-01	10.20000
2002-01-01	10.70000
2003-01-01	9.60000
2004-01-01	9.90000
2005-01-01	9.90000
2006-01-01	16.00000
2007-01-01	17.00000
2008-01-01	17.70000
2009-01-01	4.10000
2010-01-01	1.49041
2011-01-01	10.61780
2012-01-01	10.82060
2013-01-01	10.39230
2014-01-01	10.42330
2015-01-01	12.37570
2016-01-01	11.37170