Year	Percent
1960-01-01	14.415500000000000000
1961-01-01	13.878200000000000000
1962-01-01	13.016100000000000000
1963-01-01	12.002800000000000000
1964-01-01	11.091700000000000000
1965-01-01	9.892980000000000000
1966-01-01	10.008900000000000000
1967-01-01	9.101820000000000000
1968-01-01	8.355319999999999000
1969-01-01	7.980270000000000000
1970-01-01	6.989089999999999000
1971-01-01	6.319340000000000000
1972-01-01	5.621770000000000000
1973-01-01	5.041430000000000000
1974-01-01	4.449540000000000000
1975-01-01	4.335050000000000000
1976-01-01	4.566180000000000000
1977-01-01	5.202570000000000000
1978-01-01	5.490550000000000000
1979-01-01	5.259819999999999500
1980-01-01	4.075250000000000000
1981-01-01	3.016680000000000000
1982-01-01	2.252410000000000000
1983-01-01	2.029970000000000000
1984-01-01	2.022900000000000000
1985-01-01	2.447040000000000300
1986-01-01	5.751940000000000000
1987-01-01	5.843700000000000000
1988-01-01	3.298490000000000000
1989-01-01	3.095720000000000000
1990-01-01	2.575770000000000000
1991-01-01	1.393900000000000000
1992-01-01	1.346620000000000200
1993-01-01	2.527920000000000000
1994-01-01	2.474600000000000000
1995-01-01	1.719370000000000000
1996-01-01	1.522650000000000000
1997-01-01	1.101780000000000000
1998-01-01	0.944050000000000000
1999-01-01	0.855212000000000100
2000-01-01	0.845794000000000000
2001-01-01	0.847012999999999900
2002-01-01	0.822506000000000000
2003-01-01	1.149030000000000000
2004-01-01	0.676119999999999900
2005-01-01	0.024529000000000000
2006-01-01	0.021707000000000000
2007-01-01	0.019286000000000000
2008-01-01	0.017842000000000000
2009-01-01	0.019997000000000000
2010-01-01	0.024475999999999998
2011-01-01	0.029949000000000000
2012-01-01	0.025366999999999997
2013-01-01	0.022251000000000000
2014-01-01	0.024455000000000000
2015-01-01	0.021634999999999998
2016-01-01	0.015676000000000000