Year	Percent
1996-01-01	37.6315
1997-01-01	39.6602
1998-01-01	32.6141
1999-01-01	33.2122
2000-01-01	35.4548
2001-01-01	36.3363
2002-01-01	39.0575
2003-01-01	36.6283
2004-01-01	34.1728
2005-01-01	33.5609
2006-01-01	33.4615
2007-01-01	31.8292
2008-01-01	32.4450
2009-01-01	32.5067
2010-01-01	32.7926
2011-01-01	33.9264
2012-01-01	34.5382
2013-01-01	34.8108
2014-01-01	34.6284