Year	US Dollars, Sum Over Component Sub-periods
1979-01-01	1285000000
1980-01-01	1406000000
1981-01-01	1382000000
1982-01-01	1487000000
1983-01-01	719000000
1984-01-01	1257000000
1985-01-01	1666000000
1986-01-01	968000000
1987-01-01	568000000
1988-01-01	770000000
1989-01-01	1310000000
1990-01-01	1158000000
1991-01-01	905000000
1992-01-01	1115000000
1993-01-01	1307000000
1994-01-01	2261000000
1995-01-01	3369000000
1996-01-01	5235000000
1997-01-01	5159000000
1998-01-01	4599000000
1999-01-01	3935000000
2000-01-01	3621000000
2001-01-01	3280000000
2002-01-01	3295000000
2003-01-01	3339000000
2004-01-01	3199000000
2005-01-01	3194000000
2006-01-01	6462000000
2007-01-01	11493000000
2008-01-01	12511000000
2009-01-01	8826000000
2010-01-01	7405000000
2011-01-01	10753000000
2012-01-01	10888000000
2013-01-01	10071000000
2014-01-01	6327000000