Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-8341425796.86964
1991-01-01	-9209091305.67552
1992-01-01	-9440944121.98586
1993-01-01	-9937283220.19338
1994-01-01	-7964711911.56014
1995-01-01	-6779681599.04795
1996-01-01	-6098476053.13650
1997-01-01	-5698160660.88652
1998-01-01	-3439857543.29594
1999-01-01	-3662657631.37818
2000-01-01	-2791042179.86342
2001-01-01	-3159373334.98377
2002-01-01	-2722220747.85701
2003-01-01	-5197241182.31643
2004-01-01	-4493149983.02707
2005-01-01	-4936006327.15519
2006-01-01	-6617199782.54162
2007-01-01	-11471389011.70500
2008-01-01	-14241844707.93950
2009-01-01	-14225720251.74130
2010-01-01	-21257148403.69170
2011-01-01	-22867686086.18730
2012-01-01	-24222965365.97980
2013-01-01	-23700036403.34910