Year	Percent
1996-01-01	45.7991
1997-01-01	78.2832
1998-01-01	43.8615
1999-01-01	40.4619
2000-01-01	43.5062
2001-01-01	54.5517
2002-01-01	49.8502
2003-01-01	51.9371
2004-01-01	58.9075
2005-01-01	57.3877
2006-01-01	45.4144
2007-01-01	44.1402
2008-01-01	51.8472
2009-01-01	52.3133
2010-01-01	57.3965
2011-01-01	53.7651
2012-01-01	46.5181
2013-01-01	43.9713
2014-01-01	47.3713