Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-17994200000
1991-01-01	-19980000000
1992-01-01	-21343400000
1993-01-01	-5504600000
1994-01-01	-6384300000
1995-01-01	-1833500000
1996-01-01	-1417700000
1997-01-01	-508900000
1998-01-01	-7065200000
1999-01-01	-18077100000
2000-01-01	-22992900000
2001-01-01	-24021000000
2002-01-01	-22396300000
2003-01-01	-31041000000
2004-01-01	-54871100000
2005-01-01	-83094800000
2006-01-01	-110848700000
2007-01-01	-144104100000
2008-01-01	-153038500000
2009-01-01	-70213200000
2010-01-01	-62198600000
2011-01-01	-54185500000
2012-01-01	-15973600000
2013-01-01	10573300000