Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-17994240000
1991-01-01	-19979980000
1992-01-01	-21343450000
1993-01-01	-5504550000
1994-01-01	-6384300000
1995-01-01	-1833460000
1996-01-01	-1417720000
1997-01-01	-508900000
1998-01-01	-7065220000
1999-01-01	-18077120000
2000-01-01	-22992880000
2001-01-01	-24021010000
2002-01-01	-22396290000
2003-01-01	-31041040000
2004-01-01	-54871110000
2005-01-01	-83094790000
2006-01-01	-110848700000
2007-01-01	-144104050000
2008-01-01	-153038500000
2009-01-01	-70213180000
2010-01-01	-62198630000
2011-01-01	-54185490000
2012-01-01	-15973610000
2013-01-01	10573270000