Year	Percent
1996-01-01	35.329500000000000
1997-01-01	33.104900000000000
1998-01-01	34.181999999999995
1999-01-01	25.294600000000000
2000-01-01	22.653100000000000
2001-01-01	26.912100000000000
2002-01-01	22.879700000000000
2003-01-01	31.892800000000000
2004-01-01	32.819700000000000
2005-01-01	32.886200000000000
2006-01-01	33.309500000000000
2007-01-01	34.849900000000000
2008-01-01	29.204400000000000
2009-01-01	31.718100000000000
2010-01-01	35.045000000000000
2011-01-01	31.528100000000000
2012-01-01	26.554900000000000
2013-01-01	23.676500000000000
2014-01-01	17.869500000000000
2015-01-01	26.199400000000000
2016-01-01	27.830600000000000