Year	Percent
1996-01-01	15.352000000000000
1997-01-01	12.417300000000000
1998-01-01	14.039800000000000
1999-01-01	22.111000000000000
2000-01-01	20.805100000000000
2001-01-01	20.897700000000000
2002-01-01	22.663200000000000
2003-01-01	29.212700000000000
2004-01-01	31.115100000000000
2005-01-01	26.202600000000000
2006-01-01	25.103500000000000
2007-01-01	23.584600000000000
2008-01-01	19.921000000000000
2009-01-01	21.179900000000000
2010-01-01	19.241400000000000
2011-01-01	27.109100000000000
2012-01-01	26.714000000000002
2013-01-01	20.008000000000000
2014-01-01	19.647300000000000
2015-01-01	16.889400000000000
2016-01-01	15.952300000000000