Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	1649000000
1985-01-01	1851000000
1986-01-01	2218000000
1987-01-01	2467000000
1988-01-01	2887000000
1989-01-01	3011000000
1990-01-01	3425000000
1991-01-01	3598000000
1992-01-01	3637000000
1993-01-01	3879000000
1994-01-01	4154000000
1995-01-01	4693000000
1996-01-01	4504000000
1997-01-01	4913000000
1998-01-01	5466000000
1999-01-01	5887000000
2000-01-01	6838000000
2001-01-01	7753000000
2002-01-01	7040000000
2003-01-01	7803000000
2004-01-01	8260000000
2005-01-01	9483000000
2006-01-01	11074000000
2007-01-01	13531000000
2008-01-01	15256000000
2009-01-01	13472000000
2010-01-01	11691000000
2011-01-01	11807000000
2012-01-01	12195000000
2013-01-01	13877000000