Year	US Dollars, Sum Over Component Sub-periods
1970-01-01	-419830000.0000000
1971-01-01	-110930000.0000000
1972-01-01	1370500000.0000000
1973-01-01	2400760000.0000000
1974-01-01	2355190000.0000000
1975-01-01	2096590000.0000002
1976-01-01	2857440000.0000000
1977-01-01	935420000.0000000
1978-01-01	-1150790000.0000000
1979-01-01	-1834600000.0000000
1980-01-01	-1788310000.0000000
1981-01-01	2627120000.0000000
1982-01-01	4844900000.0000000
1983-01-01	4637590000.0000000
1984-01-01	5379940000.0000000
1985-01-01	4565790000.0000000
1986-01-01	4411300000.0000000
1987-01-01	3916940000.0000000
1988-01-01	6847740000.0000000
1989-01-01	9125300000.0000000
1990-01-01	8017660000.0000000
1991-01-01	7474170000.0000000
1992-01-01	6815740000.0000000
1993-01-01	13239760000.0000000
1994-01-01	17803460000.0000000
1995-01-01	26423100000.0000000
1996-01-01	21921690000.0000000
1997-01-01	25454080000.0000000
1998-01-01	13104220000.0000000
1999-01-01	16061040000.0000000
2000-01-01	7874970000.0000000
2001-01-01	10425910000.0000000
2002-01-01	11589300000.0000000
2003-01-01	29864210000.0000000
2004-01-01	46551580000.0000000
2005-01-01	47220830000.0000000
2006-01-01	63308870000.0000000
2007-01-01	52602010000.0000000
2008-01-01	37272750000.0000000
2009-01-01	41221290000.0000000
2010-01-01	57370600000.0000000
2011-01-01	75616540000.0000000
2012-01-01	73465870000.0000000
2013-01-01	87076600000.0000000