Year	Percent
1999-01-01	0.9780520000000000
2000-01-01	0.9014900000000000
2001-01-01	0.9494459999999999
2002-01-01	0.8735809999999999
2003-01-01	0.8351100000000000
2004-01-01	0.7598350000000000
2005-01-01	0.6920250000000000
2006-01-01	0.9391830000000000
2007-01-01	0.9313500000000000
2008-01-01	0.8077920000000000
2009-01-01	1.8994600000000000
2010-01-01	1.8989500000000000
2011-01-01	1.9905300000000000
2012-01-01	2.3371000000000000
2013-01-01	2.6061300000000000
2014-01-01	2.2063800000000000
2015-01-01	2.0183000000000000
2016-01-01	1.3344900000000000