Year	US Dollars, Sum Over Component Sub-periods
1971-01-01	-1215070000.0000000
1972-01-01	-1806340000.0000000
1973-01-01	-1941240000.0000000
1974-01-01	-2119739999.9999998
1975-01-01	-2175800000.0000000
1976-01-01	-2611270000.0000000
1977-01-01	-2389680000.0000000
1978-01-01	-3900370000.0000000
1979-01-01	-4969590000.0000000
1980-01-01	-4700510000.0000000
1981-01-01	-4483530000.0000000
1982-01-01	-3020130000.0000000
1983-01-01	-3680110000.0000000
1984-01-01	-4736370000.0000000
1985-01-01	-5654970000.0000000
1986-01-01	-10062030000.0000000
1987-01-01	-8726660000.0000000
1988-01-01	-14545700000.0000000
1989-01-01	-15094370000.0000000
1990-01-01	-24232670000.0000000
1991-01-01	-22947300000.0000000
1992-01-01	-18595940000.0000000
1993-01-01	-17196300000.0000000
1994-01-01	-18857820000.0000000
1995-01-01	-39051700000.0000000
1996-01-01	-50807340000.0000000
1997-01-01	-41795970000.0000000
1998-01-01	-88839750000.0000000
1999-01-01	-108695810000.0000000
2000-01-01	-56572890000.0000000
2001-01-01	-39714880000.0000000
2002-01-01	-18973010000.0000000
2003-01-01	-5827290000.0000000
2004-01-01	-20559660000.0000000
2005-01-01	-75845680000.0000000
2006-01-01	-118767150000.0000000
2007-01-01	-170653100000.0000000
2008-01-01	-72618760000.0000000
2009-01-01	-69643290000.0000000
2010-01-01	-126310970000.0000000
2011-01-01	-80992920000.0000000
2012-01-01	-79637470000.0000000
2013-01-01	-57538930000.0000000