Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	1990000000
1981-01-01	2321000000
1982-01-01	2585000000
1983-01-01	2796000000
1984-01-01	2805000000
1985-01-01	2404000000
1986-01-01	2741000000
1987-01-01	3390000000
1988-01-01	3827000000
1989-01-01	4276000000
1990-01-01	4921000000
1991-01-01	5178000000
1992-01-01	5545000000
1993-01-01	6397000000
1994-01-01	7590000000
1995-01-01	8365000000
1996-01-01	9004000000
1997-01-01	9181000000
1998-01-01	9511000000
1999-01-01	10529000000
2000-01-01	12348000000
2001-01-01	12218000000
2002-01-01	11228000000
2003-01-01	11617000000
2004-01-01	13254000000
2005-01-01	14243000000
2006-01-01	15097000000
2007-01-01	17720000000
2008-01-01	19866000000
2009-01-01	17443000000
2010-01-01	18674000000
2011-01-01	20541000000
2012-01-01	21017000000
2013-01-01	20242000000
2014-01-01	21951000000