Year	US Dollars, Sum Over Component Sub-periods
1975-01-01	-371090000
1976-01-01	-433310000
1977-01-01	-558990000
1978-01-01	-597960000
1979-01-01	-647010000
1980-01-01	-786440000
1981-01-01	-1030450000
1982-01-01	-1190910000
1983-01-01	-1148590000
1984-01-01	-1100370000
1985-01-01	-1019050000
1986-01-01	-1285200000
1987-01-01	-1572850000
1988-01-01	-1715750000
1989-01-01	-2678830000
1990-01-01	-3711290000
1991-01-01	-4663140000
1992-01-01	-5391920000
1993-01-01	-4907690000
1994-01-01	-4356630000
1995-01-01	-4456120000
1996-01-01	-3647260000
1997-01-01	-2433460000
1998-01-01	-3122330000
1999-01-01	-2025440000
2000-01-01	-1709170000
2001-01-01	-1042470000
2002-01-01	-634890000
2003-01-01	-2596940000
2004-01-01	176350000
2005-01-01	-302940000
2006-01-01	796020000
2007-01-01	-709350000
2008-01-01	-1456840000
2009-01-01	1828160000
2010-01-01	2018550000
2011-01-01	-156130000
2012-01-01	-360150000
2013-01-01	-710240000