Year	Percent
1960-01-01	0.0922402858294724
1961-01-01	8.7605114619162700
1962-01-01	1.6628713656799900
1963-01-01	4.6882325364617800
1964-01-01	3.9508384335637500
1965-01-01	-2.4460293905620700
1966-01-01	1.7124631992702000
1967-01-01	11.0135558877735000
1968-01-01	-10.0338953589390000
1969-01-01	12.6068685696760000
1970-01-01	4.0277956504717700
1971-01-01	1.3036690085934800
1972-01-01	13.5547507128621000
1973-01-01	15.2890879478773000
1974-01-01	26.1581023014198000
1975-01-01	23.9630476370738000
1976-01-01	1.6748842635821700
1977-01-01	17.0763307914922000
1978-01-01	19.2304044013514000
1979-01-01	31.1384550107529000
1980-01-01	25.3523690119419000
1981-01-01	24.5757243336575000
1982-01-01	25.7128797492595000
1983-01-01	30.5877747791383000
1984-01-01	34.1463414633600000
1985-01-01	45.4075032342100000
1986-01-01	24.4534901251321000
1987-01-01	20.5572377453910000
1988-01-01	64.7005631001051000
1989-01-01	66.7203219315900000
1990-01-01	65.1580979966202000
1991-01-01	123.5781269029360000
1992-01-01	117.6244688963940000
1993-01-01	101.3804237638130000
1994-01-01	115.3981442927380000
1995-01-01	68.3751929485423000
1996-01-01	132.8237773741380000
1997-01-01	46.6503227686797000
1998-01-01	17.1050564676441000
1999-01-01	15.9947458306277000
2000-01-01	8.0330554451262000
2001-01-01	4.8714666451439200
2002-01-01	8.3338170600070700
2003-01-01	7.7106908318543700
2004-01-01	8.4180063859367700
2005-01-01	8.5167343491986500
2006-01-01	7.1967367439130000
2007-01-01	7.9760234890032900
2008-01-01	14.3065124756486000
2009-01-01	11.2485463655403000
2010-01-01	13.2453941409943000
2011-01-01	18.0922622482665000
2012-01-01	35.5652488678551000
2013-01-01	36.5211440366904000
2014-01-01	36.9066427863594000
2015-01-01	16.9094557092798000