Year	Percent
1996-01-01	44.4393
1997-01-01	40.8241
1998-01-01	61.0232
1999-01-01	53.8462
2000-01-01	60.9407
2001-01-01	63.0713
2002-01-01	60.0601
2003-01-01	58.5573
2004-01-01	57.2683
2005-01-01	54.1325
2006-01-01	52.5542
2007-01-01	48.2126
2008-01-01	49.7253
2009-01-01	49.8658
2010-01-01	48.0684
2011-01-01	49.9270
2012-01-01	53.2570
2013-01-01	54.5483
2014-01-01	48.0431