Year	Percent
1996-01-01	18.068800000000000
1997-01-01	24.591900000000000
1998-01-01	16.919900000000000
1999-01-01	16.303900000000000
2000-01-01	19.064300000000000
2001-01-01	13.720700000000000
2002-01-01	8.256050000000000
2003-01-01	7.844320000000000
2004-01-01	9.098300000000000
2005-01-01	7.855169999999999
2006-01-01	7.153339999999999
2007-01-01	10.724700000000000
2008-01-01	18.224300000000000
2009-01-01	13.831500000000000
2010-01-01	17.917300000000000
2011-01-01	12.536900000000000
2012-01-01	27.875700000000000
2013-01-01	32.164300000000000
2014-01-01	33.304600000000000
2015-01-01	39.718200000000000
2016-01-01	42.854400000000000