Year	Percent
1996-01-01	67.7133
1997-01-01	66.4889
1998-01-01	61.3333
1999-01-01	62.9645
2000-01-01	59.8167
2001-01-01	66.7528
2002-01-01	67.1865
2003-01-01	65.5364
2004-01-01	63.9497
2005-01-01	60.7201
2006-01-01	56.8136
2007-01-01	56.8556
2008-01-01	57.1013
2009-01-01	57.0786
2010-01-01	57.7744
2011-01-01	59.4646
2012-01-01	64.9432
2013-01-01	74.0721
2014-01-01	58.4883