Year	Percent
1996-01-01	24.474400000000000
1997-01-01	20.807000000000000
1998-01-01	34.764400000000000
1999-01-01	28.803500000000000
2000-01-01	14.440800000000000
2001-01-01	27.287600000000000
2002-01-01	34.467600000000000
2003-01-01	29.126800000000000
2004-01-01	45.780700000000000
2005-01-01	55.407900000000000
2006-01-01	57.589200000000000
2007-01-01	57.778600000000000
2008-01-01	68.173500000000000
2009-01-01	58.466800000000000
2010-01-01	60.451500000000000
2011-01-01	54.937500000000000
2012-01-01	55.510900000000000
2013-01-01	48.820600000000000
2014-01-01	43.898999999999994
2015-01-01	39.402200000000000
2016-01-01	26.760700000000000