Year	Percent
1996-01-01	71.7724
1997-01-01	55.5466
1998-01-01	97.2712
1999-01-01	61.7156
2000-01-01	63.4716
2001-01-01	62.8674
2002-01-01	69.4258
2003-01-01	68.0909
2004-01-01	63.4031
2005-01-01	57.6550
2006-01-01	53.7095
2007-01-01	43.9292
2008-01-01	40.8054
2009-01-01	51.9964
2010-01-01	51.0527
2011-01-01	52.4469
2012-01-01	51.6899
2013-01-01	50.4970
2014-01-01	51.5598