Year	Percent
1996-01-01	44.031500000000000
1997-01-01	64.087100000000000
1998-01-01	51.026100000000000
1999-01-01	52.754500000000000
2000-01-01	49.257500000000000
2001-01-01	48.928800000000000
2002-01-01	49.308000000000000
2003-01-01	48.990900000000000
2004-01-01	49.174700000000000
2005-01-01	40.690600000000000
2006-01-01	41.765100000000000
2007-01-01	39.395000000000000
2008-01-01	44.276200000000000
2009-01-01	50.306000000000004
2010-01-01	46.967500000000000
2011-01-01	45.471400000000000
2012-01-01	51.004400000000000
2013-01-01	55.030400000000000
2014-01-01	53.433200000000000