Year	US Dollars, Sum Over Component Sub-periods
1982-01-01	-1709580000
1983-01-01	-1830930000
1984-01-01	-1867250000
1985-01-01	-1980530000
1986-01-01	-1788140000
1987-01-01	-1447730000
1988-01-01	-1783720000
1989-01-01	-2332590000
1990-01-01	-4449190000
1991-01-01	-6413650000
1992-01-01	-10026630000
1993-01-01	-8750740000
1994-01-01	-5945940000
1995-01-01	-5523430000
1996-01-01	-6272230000
1997-01-01	-4901530000
1998-01-01	-3260610000
1999-01-01	-2020510000
2000-01-01	-1412970000
2001-01-01	-1445660000
2002-01-01	-1148400000
2003-01-01	4037260000
2004-01-01	107780000
2005-01-01	2833570000
2006-01-01	7411200000
2007-01-01	14271340000
2008-01-01	17063460000
2009-01-01	7246020000
2010-01-01	9711060000
2011-01-01	11996390000
2012-01-01	13041170000
2013-01-01	15807020000