Year	Percent
1996-01-01	30.621800000000000
1997-01-01	31.982500000000000
1998-01-01	29.751200000000000
1999-01-01	42.331600000000000
2000-01-01	52.996600000000000
2001-01-01	36.648700000000000
2002-01-01	37.226900000000000
2003-01-01	32.954300000000000
2004-01-01	26.400900000000000
2005-01-01	30.378200000000000
2006-01-01	27.247900000000000
2007-01-01	34.582900000000000
2008-01-01	29.158100000000000
2009-01-01	27.676600000000000
2010-01-01	29.240800000000000
2011-01-01	19.747000000000000
2012-01-01	17.714000000000002
2013-01-01	11.851700000000000
2014-01-01	15.308000000000000
2015-01-01	11.472000000000001
2016-01-01	12.942800000000000