Year	Percent
1999-01-01	0.58846999999999990
2000-01-01	0.14670300000000000
2001-01-01	0.22000300000000003
2002-01-01	0.24727900000000000
2003-01-01	0.22272300000000000
2004-01-01	0.43012600000000000
2005-01-01	0.73162399999999990
2006-01-01	0.40654400000000000
2007-01-01	0.41545100000000000
2008-01-01	0.31443300000000000
2009-01-01	0.36955500000000000
2010-01-01	0.36350000000000000
2011-01-01	0.36334299999999997
2012-01-01	0.34372100000000000
2013-01-01	0.32953699999999997
2014-01-01	0.37464899999999995
2015-01-01	0.35889400000000000
2016-01-01	0.35052100000000000