Year	Percent
1996-01-01	53.2438
1997-01-01	54.8781
1998-01-01	54.0587
1999-01-01	57.7132
2000-01-01	57.5042
2001-01-01	53.3937
2002-01-01	56.7863
2003-01-01	56.0801
2004-01-01	55.5133
2005-01-01	46.9462
2006-01-01	45.0847
2007-01-01	44.0089
2008-01-01	46.6859
2009-01-01	46.1286
2010-01-01	43.8903
2011-01-01	46.0849
2012-01-01	43.9731
2013-01-01	45.1362
2014-01-01	53.8929