Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	2864000000
1981-01-01	2894000000
1982-01-01	2417000000
1983-01-01	2693000000
1984-01-01	3242000000
1985-01-01	4871000000
1986-01-01	5026000000
1987-01-01	4357000000
1988-01-01	4255000000
1989-01-01	4238000000
1990-01-01	5268000000
1991-01-01	6087000000
1992-01-01	6002000000
1993-01-01	5911000000
1994-01-01	5850000000
1995-01-01	5941000000
1996-01-01	6440000000
1997-01-01	6408000000
1998-01-01	6683000000
1999-01-01	7122000000
2000-01-01	7466000000
2001-01-01	7791000000
2002-01-01	8165000000
2003-01-01	7556000000
2004-01-01	7356000000
2005-01-01	7040000000
2006-01-01	8666000000
2007-01-01	8669000000
2008-01-01	9487000000
2009-01-01	8688000000
2010-01-01	9735000000
2011-01-01	10133000000
2012-01-01	9556000000
2013-01-01	10491000000
2014-01-01	11510000000