Year	US Dollars, Sum Over Component Sub-periods
1975-01-01	7406354000.000
1976-01-01	6029448000.000
1977-01-01	5676678000.000
1978-01-01	6695486000.000
1979-01-01	10838409000.000
1980-01-01	13081741000.000
1981-01-01	12121038000.000
1982-01-01	16642326000.000
1983-01-01	7442963000.000
1984-01-01	-497507000.000
1985-01-01	653162000.000
1986-01-01	5267237000.000
1987-01-01	2244021000.000
1988-01-01	-3347228000.000
1989-01-01	-257025000.000
1990-01-01	4111793999.650
1991-01-01	532006000.400
1992-01-01	-4722880000.100
1993-01-01	1786443000.000
1994-01-01	1477008000.000
1995-01-01	16176554000.000
1996-01-01	25301969348.780
1997-01-01	33707498843.400
1998-01-01	37671859700.370
1999-01-01	25141178977.100
2000-01-01	21587455670.600
2001-01-01	23745659851.537
2002-01-01	7702338920.580
2003-01-01	-3384708888.450
2004-01-01	-9766899088.320
2005-01-01	-13783511466.170
2006-01-01	-13548056751.860
2007-01-01	1601353103.300
2008-01-01	26388013464.400
2009-01-01	24649613000.000
2010-01-01	50811275490.200
2011-01-01	53744183742.600
2012-01-01	51110243534.240
2013-01-01	80064615331.700