Year	Percent
1996-01-01	55.3533
1997-01-01	58.8786
1998-01-01	76.7108
1999-01-01	70.7416
2000-01-01	67.0675
2001-01-01	65.6177
2002-01-01	62.9961
2003-01-01	60.4810
2004-01-01	56.5597
2005-01-01	49.6703
2006-01-01	47.4715
2007-01-01	44.8647
2008-01-01	50.7546
2009-01-01	54.4633
2010-01-01	57.2146
2011-01-01	54.7067
2012-01-01	49.8113
2013-01-01	48.5779
2014-01-01	48.7064