Year	Percent
1997-01-01	66.66670000000000
1998-01-01	99.44440000000000
1999-01-01	49.74600000000000
2000-01-01	43.55360000000000
2001-01-01	43.27610000000000
2002-01-01	64.71390000000000
2003-01-01	50.96540000000000
2004-01-01	58.65700000000000
2005-01-01	54.77620000000000
2006-01-01	56.62360000000000
2007-01-01	54.43600000000001
2008-01-01	53.22120000000000
2009-01-01	56.68280000000000
2010-01-01	56.44900000000000
2011-01-01	53.95270000000000
2012-01-01	54.12350000000000
2013-01-01	56.15090000000000
2014-01-01	55.43660000000000