Year	Percent
1990-01-01	26.752700000000000
1991-01-01	35.321999999999996
1992-01-01	38.613900000000000
1993-01-01	37.673400000000000
1994-01-01	43.784500000000000
1995-01-01	49.609100000000000
1996-01-01	50.905000000000000
1997-01-01	48.175800000000000
1998-01-01	48.463300000000000
1999-01-01	48.367600000000000
2000-01-01	43.895500000000000
2001-01-01	35.386600000000000
2002-01-01	40.771300000000000
2003-01-01	43.785500000000000
2004-01-01	42.771000000000000
2005-01-01	35.904600000000000
2006-01-01	37.220300000000000
2007-01-01	29.849900000000000
2008-01-01	22.555000000000000
2009-01-01	28.064200000000000
2010-01-01	27.113600000000000
2011-01-01	22.504600000000000
2012-01-01	24.872100000000000
2013-01-01	25.420400000000000
2014-01-01	21.652200000000000
2015-01-01	24.091200000000000
2016-01-01	21.169800000000000