Year	Percent
1985-01-01	11.049400000000000
1986-01-01	13.959700000000000
1987-01-01	13.694400000000000
1988-01-01	7.210700000000000
1989-01-01	7.220080000000000
1990-01-01	16.912000000000000
1991-01-01	23.958100000000000
1992-01-01	20.933800000000000
1993-01-01	32.301000000000000
1994-01-01	26.640300000000000
1995-01-01	27.407600000000000
1996-01-01	27.115800000000000
1997-01-01	27.097600000000000
1998-01-01	46.625300000000000
1999-01-01	45.653700000000000
2000-01-01	46.391600000000000
2001-01-01	47.647500000000000
2002-01-01	12.039600000000000
2003-01-01	12.876500000000000
2004-01-01	12.665800000000000
2005-01-01	12.545300000000000
2006-01-01	13.063200000000000
2007-01-01	12.046300000000000
2008-01-01	9.325150000000000
2009-01-01	11.532700000000000
2010-01-01	4.530090000000000
2011-01-01	8.372800000000000
2012-01-01	10.889000000000001
2013-01-01	14.794600000000000
2014-01-01	12.235000000000000
2015-01-01	13.203400000000000
2016-01-01	14.175600000000000