Year	US Dollars, Sum Over Component Sub-periods
1997-01-01	-4377300000
1998-01-01	-4182660000
1999-01-01	-17234880000
2000-01-01	-27514740000
2001-01-01	-9426480000
2002-01-01	-5078340000
2003-01-01	-918050000
2004-01-01	10239230000
2005-01-01	-16195550000
2006-01-01	-8438820000
2007-01-01	-20624480000
2008-01-01	-14134490000
2009-01-01	-6320090000
2010-01-01	108680000
2011-01-01	-13347390000
2012-01-01	-5384850000
2013-01-01	-10648560000