Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	0
1985-01-01	0
1986-01-01	146000000
1987-01-01	307000000
1988-01-01	1184000000
1989-01-01	1445000000
1990-01-01	681000000
1991-01-01	714000000
1992-01-01	3165000000
1993-01-01	4480000000
1994-01-01	1123000000
1995-01-01	703000000
1996-01-01	1950000000
1997-01-01	2344000000
1998-01-01	-5089000000
1999-01-01	4188000000
2000-01-01	1615000000
2001-01-01	-3727000000
2002-01-01	1503000000
2003-01-01	3851000000
2004-01-01	9411000000
2005-01-01	14670000000
2006-01-01	11402000000
2007-01-01	2780000000
2008-01-01	-3770000000
2009-01-01	2938000000
2010-01-01	19617000000
2011-01-01	19298000000
2012-01-01	38132000000
2013-01-01	21090000000