Year	US Dollars, Sum Over Component Sub-periods
1979-01-01	637000000
1980-01-01	351000000
1981-01-01	1000000
1982-01-01	2000000
1983-01-01	-279000000
1984-01-01	-268000000
1985-01-01	-228000000
1986-01-01	-476000000
1987-01-01	-428000000
1988-01-01	-498000000
1989-01-01	-391000000
1990-01-01	579000000
1991-01-01	3808000000
1992-01-01	14466000000
1993-01-01	12929000000
1994-01-01	54047000000
1995-01-01	10372000000
1996-01-01	22022000000
1997-01-01	10908000000
1998-01-01	18582000000
1999-01-01	3542000000
2000-01-01	8651000000
2001-01-01	872000000
2002-01-01	-4797000000
2003-01-01	5129000000
2004-01-01	-3996000000
2005-01-01	6655000000
2006-01-01	9076000000
2007-01-01	48104000000
2008-01-01	-767000000
2009-01-01	46159000000
2010-01-01	67795000000
2011-01-01	18453000000
2012-01-01	16534000000
2013-01-01	34664000000
2014-01-01	33531000000