Year	Percent
1960-01-01	5.9576100000000000000000
1961-01-01	4.9858699999999990000000
1962-01-01	4.0564300000000010000000
1963-01-01	3.9909100000000000000000
1964-01-01	4.2069700000000000000000
1965-01-01	4.1712500000000000000000
1966-01-01	4.1286100000000000000000
1967-01-01	4.4427699999999990000000
1968-01-01	4.6675300000000000000000
1969-01-01	4.5643800000000000000000
1970-01-01	3.9377100000000000000000
1971-01-01	3.6135400000000000000000
1972-01-01	3.3383700000000000000000
1973-01-01	2.7908400000000000000000
1974-01-01	2.2377599999999997000000
1975-01-01	1.8415200000000000000000
1976-01-01	1.3496200000000000000000
1977-01-01	0.9881790000000001000000
1978-01-01	0.9794420000000000000000
1979-01-01	0.8265969999999999000000
1980-01-01	1.9051400000000000000000
1981-01-01	3.1055099999999998000000
1982-01-01	2.9884200000000000000000
1983-01-01	5.4172699999999990000000
1984-01-01	5.7336599999999995000000
1985-01-01	2.6628600000000000000000
1986-01-01	1.4061900000000000000000
1987-01-01	2.5542200000000000000000
1988-01-01	2.5798300000000000000000
1989-01-01	0.4271890000000000400000
1990-01-01	0.1370670000000000000000
1991-01-01	0.2016910000000000000000
1992-01-01	0.2766020000000000000000
1993-01-01	0.1297559999999999800000
1994-01-01	0.3404420000000000000000
1995-01-01	0.5275740000000000000000
1996-01-01	0.4693700000000000000000
1997-01-01	0.4081780000000000400000
1998-01-01	0.3905170000000000000000
1999-01-01	0.3462429999999999700000
2000-01-01	0.2719620000000000000000
2001-01-01	0.2278500000000000000000
2002-01-01	0.1949580000000000000000
2003-01-01	0.1437830000000000000000
2004-01-01	0.0619960000000000000000
2005-01-01	0.0079580000000000000000
2006-01-01	0.0000032000000000000000
2007-01-01	0.0000028999999999999998
2008-01-01	0.0000026000000000000000
2009-01-01	0.0000025000000000000000
2010-01-01	0.0000022000000000000000
2011-01-01	0.0000020000000000000000
2012-01-01	0.0824080000000000100000
2013-01-01	0.2265500000000000000000
2014-01-01	0.3174020000000000000000
2015-01-01	0.4018090000000000000000
2016-01-01	0.4229890000000000600000