Year	Percent
1993-01-01	13.067000000000000
1994-01-01	15.885700000000000
1995-01-01	14.000700000000000
1996-01-01	11.735600000000000
1997-01-01	10.096600000000000
1998-01-01	11.241600000000000
1999-01-01	13.564400000000000
2000-01-01	13.371400000000000
2001-01-01	12.858800000000000
2002-01-01	14.246800000000000
2003-01-01	18.559800000000000
2004-01-01	24.609000000000000
2005-01-01	32.632800000000000
2006-01-01	42.503800000000000
2007-01-01	49.605700000000000
2008-01-01	58.107100000000000
2009-01-01	58.107100000000000
2010-01-01	57.722300000000000
2011-01-01	51.501000000000005
2012-01-01	46.913100000000000
2013-01-01	43.895600000000000
2014-01-01	41.150400000000000
2015-01-01	40.518800000000000
2016-01-01	41.400400000000000