Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	2089800000.0000002
1981-01-01	3075900000.0000000
1982-01-01	1900300000.0000000
1983-01-01	2191600000.0000000
1984-01-01	1541000000.0000000
1985-01-01	1983600000.0000000
1986-01-01	2400700000.0000000
1987-01-01	2634600000.0000000
1988-01-01	2880000000.0000000
1989-01-01	3175500000.0000000
1990-01-01	2633300000.0000000
1991-01-01	4761500000.0000000
1992-01-01	4392800000.0000000
1993-01-01	4179500000.0000000
1994-01-01	10972500000.0000000
1995-01-01	9526300000.0000000
1996-01-01	9185500000.0000000
1997-01-01	12829600000.0000000
1998-01-01	12756800000.0000000
1999-01-01	13941000000.0000000
2000-01-01	18382300000.0000000
2001-01-01	25656100000.0000000
2002-01-01	23164300000.0000000
2003-01-01	16970099999.9999980
2004-01-01	20484100000.0000000
2005-01-01	19544200000.0000000
2006-01-01	15389100000.0000000
2007-01-01	24200800000.0000000
2008-01-01	28224300000.0000000
2009-01-01	8505900000.0000000
2010-01-01	12117400000.0000000
2011-01-01	11899800000.0000000
2012-01-01	-2010300000.0000000
2013-01-01	34659600000.0000000
2014-01-01	20530600000.0000000
2015-01-01	22447900000.0000000
2016-01-01	27526000000.0000000