Year	US Dollars, Sum Over Component Sub-periods
1979-01-01	18084000000
1980-01-01	22955000000
1981-01-01	22091000000
1982-01-01	19395000000
1983-01-01	15429000000
1984-01-01	13916000000
1985-01-01	13153000000
1986-01-01	14044000000
1987-01-01	15051000000
1988-01-01	14605000000
1989-01-01	18263000000
1990-01-01	20661000000
1991-01-01	21040000000
1992-01-01	20554000000
1993-01-01	25256000000
1994-01-01	33079000000
1995-01-01	49972000000
1996-01-01	53346000000
1997-01-01	59747000000
1998-01-01	57714000000
1999-01-01	49210000000
2000-01-01	55783000000
2001-01-01	55572000000
2002-01-01	47240000000
2003-01-01	48290000000
2004-01-01	62835000000
2005-01-01	73606000000
2006-01-01	91351000000
2007-01-01	120617000000
2008-01-01	173107000000
2009-01-01	127705000000
2010-01-01	181768000000
2011-01-01	226247000000
2012-01-01	223183000000
2013-01-01	239748000000
2014-01-01	229060000000