Year	Percent
1970-01-01	4.33845000000000000
1971-01-01	4.68760000000000000
1972-01-01	3.35710000000000000
1973-01-01	2.58172000000000020
1974-01-01	1.52918000000000000
1975-01-01	1.70974000000000000
1976-01-01	1.43837000000000010
1977-01-01	1.66412999999999990
1978-01-01	1.49064000000000000
1979-01-01	1.25437999999999980
1980-01-01	0.95878500000000000
1981-01-01	1.00792000000000010
1982-01-01	1.12151000000000000
1983-01-01	0.80325600000000010
1984-01-01	0.61268300000000000
1985-01-01	0.54023400000000000
1986-01-01	0.56204200000000000
1987-01-01	0.72967299999999990
1988-01-01	0.64140500000000000
1989-01-01	0.62015200000000000
1990-01-01	0.56732900000000000
1991-01-01	2.82180999999999970
1992-01-01	2.89563000000000000
1993-01-01	2.28244000000000020
1994-01-01	3.27907000000000000
1995-01-01	2.68173000000000000
1996-01-01	1.87467000000000000
1997-01-01	2.20018000000000000
1998-01-01	2.19972999999999970
1999-01-01	1.62416000000000000
2000-01-01	1.44186000000000010
2001-01-01	1.22386000000000000
2002-01-01	1.88512000000000010
2003-01-01	2.57869000000000000
2004-01-01	2.88309000000000000
2005-01-01	0.16473200000000000
2006-01-01	0.16150100000000000
2007-01-01	0.07334900000000000
2008-01-01	0.06060300000000000
2009-01-01	0.10956600000000001
2010-01-01	0.12194800000000000
2011-01-01	0.10142500000000000
2012-01-01	0.10276600000000001
2013-01-01	0.09992700000000000
2014-01-01	0.14214400000000000
2015-01-01	0.16573100000000000
2016-01-01	0.17438399999999998
2017-01-01	1.22830000000000000