Year	Percent
1982-01-01	0.47717800000000000
1983-01-01	0.23842000000000000
1984-01-01	0.59636800000000000
1985-01-01	0.59636800000000000
1986-01-01	0.59636800000000000
1987-01-01	0.59636800000000000
1988-01-01	0.59636800000000000
1989-01-01	0.59636800000000000
1990-01-01	0.59636800000000000
1991-01-01	0.59636800000000000
1992-01-01	0.27696200000000000
1993-01-01	0.27358600000000000
1994-01-01	0.24774699999999997
1995-01-01	0.27347600000000000
1996-01-01	2.06973000000000000
1997-01-01	2.00230000000000000
1998-01-01	1.95114000000000000
1999-01-01	2.95067999999999970
2000-01-01	3.83068000000000000
2001-01-01	3.20273000000000000
2002-01-01	7.05921000000000000
2003-01-01	13.38400000000000000
2004-01-01	19.46880000000000000
2005-01-01	24.40220000000000000
2006-01-01	14.95260000000000000
2007-01-01	16.00240000000000000
2008-01-01	14.24610000000000000
2009-01-01	12.71350000000000000
2010-01-01	16.17990000000000000
2011-01-01	16.00140000000000000
2012-01-01	16.39870000000000000
2013-01-01	10.97500000000000000
2014-01-01	10.71330000000000000
2015-01-01	9.56318999999999900
2016-01-01	7.68185000000000000
2017-01-01	7.48937000000000000