Year	US Dollars, Sum Over Component Sub-periods
1981-01-01	2173450000.00000000
1982-01-01	527669999.99999994
1983-01-01	2444670000.00000000
1984-01-01	3279500000.00000000
1985-01-01	3037060000.00000000
1986-01-01	-4692080000.00000000
1987-01-01	-4353310000.00000000
1988-01-01	-4021730000.00000000
1989-01-01	-93580000.00000000
1990-01-01	2943300000.00000000
1991-01-01	4381600000.00000000
1992-01-01	4469880000.00000000
1993-01-01	3520660000.00000000
1994-01-01	3737810000.00000000
1995-01-01	5246650000.00000000
1996-01-01	10950620000.00000000
1997-01-01	9964200000.00000000
1998-01-01	4900000.00000000
1999-01-01	8918930000.00000000
2000-01-01	25279860000.00000000
2001-01-01	27538840000.00000000
2002-01-01	24084740000.00000000
2003-01-01	27679590000.00000000
2004-01-01	32884129999.99999600
2005-01-01	50120110000.00000000
2006-01-01	55768700000.00000000
2007-01-01	49053390000.00000000
2008-01-01	72260110000.00000000
2009-01-01	44396270000.00000000
2010-01-01	50108690000.00000000
2011-01-01	66447140000.00000000
2012-01-01	72499520000.00000000
2013-01-01	57344820000.00000000