Year	Percent
1997-01-01	52.152600000000000
1998-01-01	12.033900000000000
1999-01-01	11.792300000000000
2000-01-01	2.869750000000000
2001-01-01	26.921100000000000
2002-01-01	5.527160000000000
2003-01-01	8.884720000000000
2004-01-01	6.572019999999999
2005-01-01	5.905480000000001
2006-01-01	9.832510000000001
2007-01-01	13.924100000000000
2008-01-01	13.349700000000000
2009-01-01	8.843580000000001
2010-01-01	10.157800000000000
2011-01-01	11.236600000000000
2012-01-01	13.323400000000000
2013-01-01	13.491000000000000
2014-01-01	12.894700000000000
2015-01-01	14.345200000000000
2016-01-01	13.490100000000000