Year	Percent
1996-01-01	31.611300000000000
1997-01-01	36.078400000000000
1998-01-01	32.879500000000000
1999-01-01	27.641200000000000
2000-01-01	31.588200000000000
2001-01-01	35.439700000000000
2002-01-01	36.264500000000000
2003-01-01	49.146400000000000
2004-01-01	50.192700000000000
2005-01-01	47.306000000000004
2006-01-01	44.405800000000000
2007-01-01	43.234400000000000
2008-01-01	34.396700000000000
2009-01-01	35.760200000000000
2010-01-01	31.927700000000000
2011-01-01	29.778100000000000
2012-01-01	31.658200000000000
2013-01-01	30.246800000000000
2014-01-01	31.834700000000000
2015-01-01	31.967200000000000
2016-01-01	35.291700000000000