Year	Percent
1960-01-01	4.452580000000000000
1961-01-01	5.797200000000000000
1962-01-01	7.413150000000000000
1963-01-01	7.465860000000000000
1964-01-01	7.053939999999999000
1965-01-01	6.060150000000000000
1966-01-01	4.208140000000000000
1967-01-01	2.196840000000000300
1968-01-01	1.218740000000000000
1969-01-01	3.591350000000000000
1970-01-01	5.835590000000000000
1971-01-01	5.758230000000000000
1972-01-01	3.283509999999999700
1973-01-01	0.925709000000000000
1974-01-01	0.207931000000000000
1975-01-01	0.123405000000000000
1976-01-01	1.945820000000000000
1977-01-01	1.813340000000000200
1978-01-01	0.012459999999999999
1979-01-01	0.008339000000000000
1980-01-01	0.019520000000000000
1981-01-01	0.035344000000000000
1982-01-01	0.041022000000000000
1983-01-01	0.085137000000000000
1984-01-01	0.127518000000000020
1985-01-01	0.087422000000000000
1986-01-01	0.048648000000000004
1987-01-01	0.361917000000000000
1988-01-01	0.446395000000000000
1989-01-01	0.321248000000000000
1990-01-01	1.518930000000000000
1991-01-01	4.480980000000001000
1992-01-01	6.200950000000000000
1993-01-01	3.923780000000000300
1994-01-01	2.511180000000000000
1995-01-01	4.074370000000000000
1996-01-01	5.177810000000000000
1997-01-01	4.594990000000000000
1998-01-01	2.703010000000000000
1999-01-01	0.938499000000000000
2000-01-01	0.430233000000000000
2001-01-01	0.410880000000000000
2002-01-01	0.261476000000000040
2003-01-01	0.341703000000000030
2004-01-01	0.780928000000000000
2005-01-01	0.770598999999999900
2006-01-01	0.952637000000000100
2007-01-01	2.442130000000000000
2008-01-01	3.930040000000000000
2009-01-01	4.022850000000000000
2010-01-01	3.776880000000000200
2011-01-01	4.596060000000000000
2012-01-01	4.589060000000000000
2013-01-01	4.198710000000000000
2014-01-01	4.350540000000000500
2015-01-01	5.988430000000000000
2016-01-01	9.041039999999999000