Year	Percent
1979-01-01	2.39389000000000030
1980-01-01	2.19475000000000000
1981-01-01	1.81735000000000000
1982-01-01	2.18893000000000000
1983-01-01	2.94050999999999970
1984-01-01	4.17847000000000000
1985-01-01	5.56350000000000000
1986-01-01	5.01835999999999950
1987-01-01	4.37373000000000000
1988-01-01	3.51990000000000000
1989-01-01	2.69059000000000030
1990-01-01	2.32901000000000000
1991-01-01	2.67567000000000000
1992-01-01	1.83208000000000000
1993-01-01	1.23941000000000010
1994-01-01	0.91914699999999990
1995-01-01	0.60949500000000000
1996-01-01	0.51018999999999990
1997-01-01	0.39716999999999997
1998-01-01	0.29541200000000000
1999-01-01	0.26213000000000003
2000-01-01	0.35683600000000000
2001-01-01	0.45676500000000000
2002-01-01	0.50591000000000010
2003-01-01	0.45149100000000000
2004-01-01	0.42236899999999994
2005-01-01	0.49320800000000000
2006-01-01	0.44649600000000000
2007-01-01	0.47360399999999997
2008-01-01	0.46289700000000000
2009-01-01	0.89164400000000010
2010-01-01	1.29619000000000000
2011-01-01	1.26080000000000000
2012-01-01	0.77017500000000000
2013-01-01	0.18015599999999998
2014-01-01	0.16784900000000000
2015-01-01	0.16101300000000002
2016-01-01	0.07884900000000000