Year	Percent
1996-01-01	57.142900000000000
1997-01-01	52.941200000000000
1998-01-01	63.636400000000000
1999-01-01	73.611100000000000
2000-01-01	80.581200000000000
2001-01-01	76.213900000000000
2002-01-01	67.417600000000000
2003-01-01	69.144800000000000
2004-01-01	61.758999999999990
2005-01-01	50.840500000000000
2006-01-01	57.776800000000000
2007-01-01	42.883100000000000
2008-01-01	40.694300000000000
2009-01-01	46.828999999999990
2010-01-01	31.499000000000002
2011-01-01	32.270800000000000
2012-01-01	42.333400000000000
2013-01-01	41.305900000000000
2014-01-01	44.279900000000000