Year	Percent
1975-01-01	1.02332000000000000
1976-01-01	0.75421200000000000
1977-01-01	0.55862300000000000
1978-01-01	0.64415500000000000
1979-01-01	0.82554800000000000
1980-01-01	1.00562000000000020
1981-01-01	0.90119100000000000
1982-01-01	1.09769000000000000
1983-01-01	1.33131000000000000
1984-01-01	1.31991000000000010
1985-01-01	1.39525000000000000
1986-01-01	0.61404700000000000
1987-01-01	0.61108699999999990
1988-01-01	0.51074800000000000
1989-01-01	0.41156800000000004
1990-01-01	0.22347100000000000
1991-01-01	0.84578199999999990
1992-01-01	0.82672800000000000
1993-01-01	1.88244000000000010
1994-01-01	1.43312000000000020
1995-01-01	1.01025000000000000
1996-01-01	2.26552000000000000
1997-01-01	3.29832000000000000
1998-01-01	4.24750000000000000
1999-01-01	6.41979000000000000
2000-01-01	6.82370000000000000
2001-01-01	9.84645000000000000
2002-01-01	12.94290000000000000
2003-01-01	13.15120000000000000
2004-01-01	10.74480000000000000
2005-01-01	8.70737000000000000
2006-01-01	6.97082000000000000
2007-01-01	5.94565000000000000
2008-01-01	5.58010000000000000
2009-01-01	6.49111000000000000
2010-01-01	7.24956000000000100
2011-01-01	7.99280000000000000
2012-01-01	9.68133000000000000
2013-01-01	12.77260000000000000
2014-01-01	17.61710000000000000
2015-01-01	21.79390000000000000
2016-01-01	22.72900000000000000