Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	-8551000000
1995-01-01	7864000000
1996-01-01	6677000000
1997-01-01	7413000000
1998-01-01	13284000000
1999-01-01	10462000000
2000-01-01	10221000000
2001-01-01	3173000000
2002-01-01	7180000000
2003-01-01	8686000000
2004-01-01	7997000000
2005-01-01	15180000000
2006-01-01	13261000000
2007-01-01	38067000000
2008-01-01	39039000000
2009-01-01	34902000000
2010-01-01	41004000000
2011-01-01	31954000000
2012-01-01	22574000000
2013-01-01	4263000000