Year	Percent
1997-01-01	0.33843600000000000
1998-01-01	0.32565700000000003
1999-01-01	0.25277100000000000
2000-01-01	0.26552300000000000
2001-01-01	0.61759500000000000
2002-01-01	0.61994399999999990
2003-01-01	0.68151700000000000
2004-01-01	0.65135200000000000
2005-01-01	0.55460700000000000
2006-01-01	0.38247200000000000
2007-01-01	0.43782900000000000
2008-01-01	0.35384899999999997
2009-01-01	0.38017800000000000
2010-01-01	0.29045900000000000
2011-01-01	0.29514900000000000
2012-01-01	0.43017900000000000
2013-01-01	0.44785600000000003
2014-01-01	0.40621100000000000
2015-01-01	0.44776600000000000