Year	Percent
1983-01-01	13.2525000000000000
1984-01-01	9.5563700000000000
1985-01-01	14.3367000000000000
1986-01-01	13.4043000000000000
1987-01-01	11.5350000000000000
1988-01-01	14.7277000000000000
1989-01-01	10.7995000000000000
1990-01-01	12.5258000000000000
1991-01-01	7.6968600000000010
1992-01-01	5.7361500000000000
1993-01-01	6.8002899999999995
1994-01-01	4.1795500000000000
1995-01-01	5.0166300000000000
1996-01-01	6.0307800000000000
1997-01-01	14.7652000000000000
1998-01-01	10.5446000000000000
1999-01-01	11.5248000000000000
2000-01-01	13.2957000000000000
2001-01-01	15.7463000000000000
2002-01-01	10.5706000000000000
2003-01-01	13.4990000000000000
2004-01-01	15.3836000000000000
2005-01-01	13.1384000000000000
2006-01-01	7.0378200000000000
2007-01-01	8.5797100000000000
2008-01-01	7.1197399999999990
2009-01-01	6.4167600000000000
2010-01-01	6.9390199999999990
2011-01-01	5.7294000000000000
2012-01-01	8.9462300000000000
2013-01-01	8.7806600000000010
2014-01-01	8.9881900000000000
2015-01-01	11.4029000000000000
2016-01-01	9.5993900000000000