Year	Percent
1996-01-01	55.74920000000000
1997-01-01	62.84260000000000
1998-01-01	66.49350000000000
1999-01-01	68.68510000000000
2000-01-01	67.36670000000000
2001-01-01	60.30890000000000
2002-01-01	60.20530000000000
2003-01-01	54.25030000000000
2004-01-01	59.10400000000000
2005-01-01	55.96180000000000
2006-01-01	54.18780000000000
2007-01-01	61.36250000000000
2008-01-01	74.05490000000000
2009-01-01	54.83850000000000
2010-01-01	60.09430000000000
2011-01-01	66.90030000000000
2012-01-01	60.77910000000000
2013-01-01	58.86000000000000
2014-01-01	67.71600000000001