Year	Percent
1996-01-01	13.573300000000000
1997-01-01	14.539400000000000
1998-01-01	15.151500000000000
1999-01-01	13.960900000000000
2000-01-01	9.761700000000000
2001-01-01	13.313900000000000
2002-01-01	15.668400000000000
2003-01-01	16.680500000000000
2004-01-01	16.571300000000000
2005-01-01	21.470300000000000
2006-01-01	20.790500000000000
2007-01-01	21.404600000000000
2008-01-01	19.855200000000000
2009-01-01	17.053000000000000
2010-01-01	19.132000000000000
2011-01-01	19.034800000000000
2012-01-01	16.624000000000002
2013-01-01	15.742700000000000
2014-01-01	15.641800000000000
2015-01-01	15.065999999999999
2016-01-01	13.741700000000000