Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	145970000.00000000
1961-01-01	50440000.00000000
1962-01-01	76340000.00000000
1963-01-01	141820000.00000000
1964-01-01	176920000.00000000
1965-01-01	92950000.00000000
1966-01-01	146110000.00000000
1967-01-01	120430000.00000000
1968-01-01	91110000.00000000
1969-01-01	50480000.00000000
1970-01-01	3830000.00000000
1971-01-01	29270000.00000000
1972-01-01	57670000.00000000
1973-01-01	67940000.00000000
1974-01-01	206630000.00000000
1975-01-01	-212510000.00000000
1976-01-01	-84370000.00000000
1977-01-01	29300000.00000000
1978-01-01	52240000.00000000
1979-01-01	-36550000.00000000
1980-01-01	-12850000.00000000
1981-01-01	-449960000.00000000
1982-01-01	-538010000.00000000
1983-01-01	-419760000.00000000
1984-01-01	-408560000.00000000
1985-01-01	-529909999.99999994
1986-01-01	-711250000.00000000
1987-01-01	-1266060000.00000000
1988-01-01	-1531540000.00000000
1989-01-01	-1734740000.00000000
1990-01-01	-1470510000.00000000
1991-01-01	-856110000.00000000
1992-01-01	-1799550000.00000000
1993-01-01	-1414180000.00000000
1994-01-01	-2161650000.00000000
1995-01-01	-3497880000.00000000
1996-01-01	-3921800000.00000000
1997-01-01	-3314410000.00000000
1998-01-01	-2818030000.00000000
1999-01-01	-2758540000.00000000
2000-01-01	-2514100000.00000000
2001-01-01	-2750160000.00000000
2002-01-01	-1569070000.00000000
2003-01-01	-1044000000.00000000
2004-01-01	2611080000.00000000
2005-01-01	5215990000.00000000
2006-01-01	10970550000.00000000
2007-01-01	16146860000.00000000
2008-01-01	19482740000.00000000
2009-01-01	12187930000.00000000
2010-01-01	6924140000.00000000