Year	Percent
1996-01-01	37.894800000000000
1997-01-01	29.298600000000000
1998-01-01	22.209600000000000
1999-01-01	19.783100000000000
2000-01-01	20.235000000000000
2001-01-01	19.854000000000000
2002-01-01	22.411900000000000
2003-01-01	24.120400000000000
2004-01-01	24.180999999999997
2005-01-01	21.049500000000000
2006-01-01	22.818900000000000
2007-01-01	17.154700000000000
2008-01-01	15.452100000000000
2009-01-01	21.663900000000000
2010-01-01	16.076100000000000
2011-01-01	14.190500000000000
2012-01-01	12.214300000000000
2013-01-01	14.007100000000000
2014-01-01	-2.380030000000000
2015-01-01	6.654680000000000
2016-01-01	14.315300000000000