Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	-29073300000
1991-01-01	-30397400000
1992-01-01	-30160900000
1993-01-01	-14959600000
1994-01-01	-14740400000
1995-01-01	-18612400000
1996-01-01	-16048400000
1997-01-01	-14219300000
1998-01-01	-21458600000
1999-01-01	-31937200000
2000-01-01	-37075200000
2001-01-01	-34569000000
2002-01-01	-34408500000
2003-01-01	-45007300000
2004-01-01	-66670000000
2005-01-01	-85261700000
2006-01-01	-104488800000
2007-01-01	-124733100000
2008-01-01	-125141000000
2009-01-01	-57808400000
2010-01-01	-63801300000
2011-01-01	-60419400000
2012-01-01	-35727800000
2013-01-01	-15447500000