Year	Percent
1996-01-01	55.3179
1997-01-01	39.6747
1998-01-01	39.6258
1999-01-01	43.4930
2000-01-01	43.7124
2001-01-01	43.1583
2002-01-01	40.7063
2003-01-01	50.5074
2004-01-01	42.5115
2005-01-01	34.8943
2006-01-01	40.5384
2007-01-01	34.6134
2008-01-01	40.2317
2009-01-01	41.3392
2010-01-01	43.4912
2011-01-01	43.2171
2012-01-01	42.0658
2013-01-01	42.1991
2014-01-01	40.9907