Year	Dollars
1948-01-01	33898305.120
1949-01-01	8780487.813
1950-01-01	-3787673.528
1951-01-01	6648543.760
1952-01-01	-9198578.033
1953-01-01	-5180653.726
1954-01-01	-10353298.880
1955-01-01	-30343128.840
1956-01-01	-32523118.010
1957-01-01	-34255637.500
1958-01-01	-63938746.400
1959-01-01	-58531772.130
1960-01-01	-84549484.560
1961-01-01	-71357907.520
1962-01-01	-47477616.560
1963-01-01	-31630845.750
1964-01-01	-30155515.700
1965-01-01	4232757.049
1966-01-01	64641246.480
1967-01-01	107781836.200
1968-01-01	149661169.500
1969-01-01	150012138.000
1970-01-01	182494093.600
1971-01-01	244982104.200
1972-01-01	283844966.200
1973-01-01	344672596.400
1974-01-01	550241273.500
1975-01-01	485554706.900
1976-01-01	529968640.900
1977-01-01	428903546.500
1978-01-01	111156431.800
1979-01-01	464621785.700
1980-01-01	423847093.900
1981-01-01	527218985.200
1982-01-01	1262162736.000
1983-01-01	1085346489.000
1984-01-01	1058224593.000
1985-01-01	1065741392.000
1986-01-01	1312971316.000
1987-01-01	2803363445.000
1988-01-01	3924142189.000
1989-01-01	4629188291.000
1990-01-01	5330717070.000
1991-01-01	5596034413.000
1992-01-01	7105180302.000
1993-01-01	8291584717.000
1994-01-01	7498209694.000
1995-01-01	4949774283.000
1996-01-01	5833410924.000
1997-01-01	5429291020.000
1998-01-01	3336238761.000
1999-01-01	3400111633.000
2000-01-01	3581162599.000
2001-01-01	3720616291.000
2002-01-01	3145066389.000
2003-01-01	3020392814.000
2004-01-01	3415763922.000
2005-01-01	4858381211.000
2006-01-01	3705486798.000
2007-01-01	3933656684.000
2008-01-01	4324303444.000