Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	-1759220000
1995-01-01	-2214550000
1996-01-01	-9264630000
1997-01-01	-7058790000
1998-01-01	5804180000
1999-01-01	-7682020000
2000-01-01	-19463920000
2001-01-01	-27600700000
2002-01-01	-22699860000
2003-01-01	-21381620000
2004-01-01	-27740290000
2005-01-01	-51458330000
2006-01-01	-45356810000
2007-01-01	-21683030000
2008-01-01	-77251410000
2009-01-01	-41663560000
2010-01-01	-39547010000
2011-01-01	-72425830000
2012-01-01	-51400870000
2013-01-01	-50101590000