Year	Percent
1993-01-01	65.71600000000001
1994-01-01	66.26280000000000
1995-01-01	68.62920000000000
1996-01-01	67.48530000000000
1997-01-01	65.95230000000000
1998-01-01	61.32280000000000
1999-01-01	54.59290000000000
2000-01-01	49.60930000000000
2001-01-01	46.10370000000000
2002-01-01	44.50060000000000
2003-01-01	44.64680000000000
2004-01-01	44.25160000000000
2005-01-01	44.07420000000000
2006-01-01	47.16580000000000
2007-01-01	51.14020000000000
2008-01-01	58.13510000000000
2009-01-01	61.46770000000000
2010-01-01	61.48860000000000
2011-01-01	64.10380000000000
2012-01-01	68.63740000000000
2013-01-01	70.13810000000000
2014-01-01	67.93560000000000
2015-01-01	65.38180000000000
2016-01-01	63.66790000000000