Year	Percent
1996-01-01	63.29030000000000
1997-01-01	63.91220000000000
1998-01-01	60.84490000000000
1999-01-01	60.04210000000000
2000-01-01	66.95150000000000
2001-01-01	74.61399999999999
2002-01-01	84.41090000000000
2003-01-01	98.17130000000000
2004-01-01	62.69630000000000
2005-01-01	60.24330000000000
2006-01-01	65.57530000000000
2007-01-01	65.91680000000000
2008-01-01	66.99380000000000
2009-01-01	64.86530000000000
2010-01-01	65.54780000000000
2011-01-01	64.31660000000000
2012-01-01	63.14670000000000
2013-01-01	61.40050000000000
2014-01-01	60.88200000000000
2015-01-01	64.03590000000000
2016-01-01	62.68480000000000