Year	Percent
1996-01-01	48.9674
1997-01-01	43.7132
1998-01-01	50.6112
1999-01-01	57.8036
2000-01-01	60.1696
2001-01-01	44.5786
2002-01-01	58.3859
2003-01-01	68.1444
2004-01-01	69.0661
2005-01-01	71.5448
2006-01-01	67.5789
2007-01-01	66.6240
2008-01-01	69.1024
2009-01-01	71.2474
2010-01-01	67.5005
2011-01-01	64.4811
2012-01-01	66.9151
2013-01-01	66.1526
2014-01-01	64.1568