Year	Percent
1996-01-01	24.887400000000000
1997-01-01	32.575300000000000
1998-01-01	35.276600000000000
1999-01-01	45.984400000000000
2000-01-01	52.572800000000000
2001-01-01	57.732500000000000
2002-01-01	56.598800000000000
2003-01-01	47.973800000000000
2004-01-01	47.735400000000000
2005-01-01	42.416000000000004
2006-01-01	40.535600000000000
2007-01-01	35.147800000000000
2008-01-01	50.625900000000000
2009-01-01	57.748100000000000
2010-01-01	63.657500000000000
2011-01-01	62.695000000000000
2012-01-01	64.555800000000000
2013-01-01	61.666100000000000
2014-01-01	56.410200000000000