Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-20288472523.7062
1991-01-01	-18160799197.3127
1992-01-01	-18171315125.5291
1993-01-01	-21364267582.9819
1994-01-01	-19580496376.0158
1995-01-01	-23239626467.8381
1996-01-01	-22008627958.9866
1997-01-01	-21556548997.9001
1998-01-01	-21401535791.1234
1999-01-01	-23482475429.6998
2000-01-01	-23417146897.2522
2001-01-01	-26464595364.0566
2002-01-01	-20661872030.9971
2003-01-01	-23583963628.3570
2004-01-01	-21237550518.4749
2005-01-01	-22315601251.6764
2006-01-01	-15583831675.4581
2007-01-01	-17544970097.5031
2008-01-01	-24302184892.3166
2009-01-01	-17654892455.0618
2010-01-01	-22808240784.9291
2011-01-01	-23371161380.0076
2012-01-01	-22464661290.4571
2013-01-01	-25458075476.2772