Year	Percent
1996-01-01	14.940300000000000
1997-01-01	13.172900000000000
1998-01-01	15.726300000000000
1999-01-01	21.225900000000000
2000-01-01	22.506300000000000
2001-01-01	25.219100000000000
2002-01-01	26.082300000000000
2003-01-01	27.714300000000000
2004-01-01	24.985500000000000
2005-01-01	18.495000000000000
2006-01-01	20.663500000000000
2007-01-01	27.307900000000000
2008-01-01	23.133000000000003
2009-01-01	24.258400000000000
2010-01-01	18.781500000000000
2011-01-01	18.184500000000000
2012-01-01	17.464600000000000
2013-01-01	15.963800000000000
2014-01-01	12.052200000000000
2015-01-01	12.692400000000000
2016-01-01	12.927700000000000