Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	41400000
1981-01-01	1162100000
1982-01-01	921300000
1983-01-01	-652900000
1984-01-01	-755200000
1985-01-01	-984800000
1986-01-01	-1227500000
1987-01-01	-1401000000
1988-01-01	306300000
1989-01-01	395300000
1990-01-01	-3945500000
1991-01-01	12148800000
1992-01-01	19206300000
1993-01-01	28255000000
1994-01-01	7932100000
1995-01-01	-13632500000
1996-01-01	13697200000
1997-01-01	6942200000
1998-01-01	900600000
1999-01-01	10580300000
2000-01-01	1741800000
2001-01-01	5010300000
2002-01-01	100500000
2003-01-01	4220200000
2004-01-01	3252300000
2005-01-01	-13487200000
2006-01-01	-1606600000
2007-01-01	-1453800000
2008-01-01	17238000000
2009-01-01	-14981500000
2010-01-01	32136800000
2011-01-01	47835900000
2012-01-01	73348200000
2013-01-01	49032400000
2014-01-01	46344700000
2015-01-01	27972400000
2016-01-01	30709000000