Year	Percent
1996-01-01	12.990500000000000
1997-01-01	13.763900000000000
1998-01-01	14.298400000000000
1999-01-01	14.878200000000000
2000-01-01	12.930300000000000
2001-01-01	9.653930000000000
2002-01-01	7.286050000000000
2003-01-01	7.248410000000001
2004-01-01	8.319880000000000
2005-01-01	8.947970000000000
2006-01-01	9.812870000000000
2007-01-01	14.684200000000000
2008-01-01	14.080300000000000
2009-01-01	12.502100000000000
2010-01-01	15.105300000000000
2011-01-01	11.787900000000000
2012-01-01	14.991400000000000
2013-01-01	15.330300000000000
2014-01-01	17.892600000000000
2015-01-01	21.727900000000000
2016-01-01	22.590500000000000