Year	Percent
1996-01-01	63.711600000000000
1997-01-01	67.154400000000000
1998-01-01	62.501800000000000
1999-01-01	67.378200000000000
2000-01-01	66.053400000000000
2001-01-01	69.777400000000000
2002-01-01	67.793300000000000
2003-01-01	64.523300000000000
2004-01-01	63.027200000000000
2005-01-01	68.294900000000000
2006-01-01	56.926400000000000
2007-01-01	64.385700000000000
2008-01-01	60.176900000000000
2009-01-01	68.232400000000000
2010-01-01	59.623000000000005
2011-01-01	59.426400000000000
2012-01-01	67.651700000000000
2013-01-01	57.256600000000000
2014-01-01	60.961800000000000