Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	0
1995-01-01	1176000000
1996-01-01	22000000
1997-01-01	1295000000
1998-01-01	1827000000
1999-01-01	691000000
2000-01-01	3423000000
2001-01-01	1067000000
2002-01-01	3051000000
2003-01-01	3740000000
2004-01-01	10571000000
2005-01-01	15095000000
2006-01-01	1706000000
2007-01-01	113000000
2008-01-01	-4723000000
2009-01-01	16202000000
2010-01-01	26649000000
2011-01-01	15875000000
2012-01-01	20747000000
2013-01-01	2652000000