Year	US Dollars, Sum Over Component Sub-periods
1995-01-01	11004200000
1996-01-01	14956600000
1997-01-01	26954900000
1998-01-01	24873300000
1999-01-01	17625900000
2000-01-01	-3300200000
2001-01-01	3534700000
2002-01-01	7505700000
2003-01-01	3236700000
2004-01-01	-4759800000
2005-01-01	-27912600000
2006-01-01	-38151300000
2007-01-01	-56309100000
2008-01-01	-86834100000
2009-01-01	-59704000000
2010-01-01	-70876700000
2011-01-01	-106538400000
2012-01-01	-90716500000
2013-01-01	-82679100000