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	2633200000.0000000
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	30060000000.0000000
2002-01-01	24055100000.0000000
2003-01-01	18223500000.0000000
2004-01-01	24916100000.0000000
2005-01-01	26018200000.0000000
2006-01-01	21147600000.0000000
2007-01-01	32457200000.0000000
2008-01-01	29381500000.0000000
2009-01-01	18111800000.0000000
2010-01-01	27262800000.0000000
2011-01-01	24706200000.0000000
2012-01-01	21060800000.0000000
2013-01-01	47536900000.0000000
2014-01-01	27507900000.0000000
2015-01-01	33181300000.0000040
2016-01-01	26738600000.0000000