Year	US Dollars, Sum Over Component Sub-periods
1987-01-01	-2016370000
1988-01-01	-2137750000
1989-01-01	-1940790000
1990-01-01	-1824260000
1991-01-01	-2732410000
1992-01-01	-2666070000
1993-01-01	-3092370000
1994-01-01	-3514320000
1995-01-01	-3979780000
1996-01-01	-4819630000
1997-01-01	-4771430000
1998-01-01	-2534080000
1999-01-01	-3137340000
2000-01-01	-3191830000
2001-01-01	-2813110000
2002-01-01	-3116500000
2003-01-01	-3932080000
2004-01-01	-5409490000
2005-01-01	-6968500000
2006-01-01	-7511490000
2007-01-01	-9441770000
2008-01-01	-9892840000
2009-01-01	-5610590000
2010-01-01	-6708860000
2011-01-01	-7972700000
2012-01-01	-7655690000
2013-01-01	-7802430000