Year	US Dollars, Monthly Level
1980-01-01	-4289916175.26298000
1981-01-01	-4922150892.77574900
1982-01-01	6200921610.07068100
1983-01-01	13392269145.70600100
1984-01-01	12019876279.98740000
1985-01-01	7098018539.09030100
1986-01-01	3711954776.75336000
1987-01-01	7238303202.25163900
1988-01-01	368776172.36243900
1989-01-01	-2583862491.59282000
1990-01-01	-4393075632.16732000
1991-01-01	-7354345194.10159000
1992-01-01	-15635616442.11900000
1993-01-01	-13499915272.07970000
1994-01-01	-18585493544.81810000
1995-01-01	6956758853.49147000
1996-01-01	6732170935.37918000
1997-01-01	800577046.03592500
1998-01-01	-7886738890.16916000
1999-01-01	-5414225675.24450000
2000-01-01	-8226043139.30750000
2001-01-01	-9461843245.38740000
2002-01-01	-7587817989.37290000
2003-01-01	-5597792381.30400000
2004-01-01	-8382800519.05190000
2005-01-01	-7672012169.14830000
2006-01-01	-6187836630.69060000
2007-01-01	-10001712156.84740000
2008-01-01	-17326091709.05420000
2009-01-01	-4834366487.75659000
2010-01-01	-2983304135.60830000
2011-01-01	-1602228289.55640000
2012-01-01	69554556.85030359
2013-01-01	-1436651883.82080000
2014-01-01	-3724315681.40650000
2015-01-01	-14563267014.26500000
2016-01-01	-13314475898.77900000
2017-01-01	-11043161813.32070000