Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-20318462241.517200
1991-01-01	-22889674126.423200
1992-01-01	-21537231329.188100
1993-01-01	-22302112735.187900
1994-01-01	-13864118895.966000
1995-01-01	-5177476350.653920
1996-01-01	2422672223.104840
1997-01-01	-8982617433.108100
1998-01-01	-8821754981.209870
1999-01-01	785576448.413589
2000-01-01	18577769298.536000
2001-01-01	15674160024.541300
2002-01-01	12527056076.006500
2003-01-01	10212386115.458500
2004-01-01	23225112245.486200
2005-01-01	21577799938.103900
2006-01-01	17933263785.832900
2007-01-01	11359690968.747800
2008-01-01	1788192682.679320
2009-01-01	-40082064161.908800
2010-01-01	-56703200705.336100
2011-01-01	-48997851636.547500
2012-01-01	-62261177039.637700
2013-01-01	-58523965538.162800