Year	US Dollars, Sum Over Component Sub-periods
1981-01-01	2234980000.0000000
1982-01-01	7474980000.0000000
1983-01-01	5870530000.0000000
1984-01-01	2475900000.0000000
1985-01-01	1271770000.0000000
1986-01-01	5180410000.0000000
1987-01-01	2851490000.0000000
1988-01-01	2329850000.0000000
1989-01-01	2423450000.0000000
1990-01-01	2243860000.0000000
1991-01-01	4168770000.0000005
1992-01-01	4059420000.0000000
1993-01-01	5037580000.0000000
1994-01-01	3055440000.0000000
1995-01-01	8685640000.0000000
1996-01-01	6344280000.0000000
1997-01-01	7534390000.0000000
1998-01-01	-6196300000.0000000
1999-01-01	-7859920000.0000000
2000-01-01	-11821420000.0000000
2001-01-01	-7601870000.0000000
2002-01-01	-6060960000.0000000
2003-01-01	-4596730000.0000000
2004-01-01	1530970000.0000000
2005-01-01	-141440000.0000000
2006-01-01	-11932990000.0000000
2007-01-01	-9114890000.0000000
2008-01-01	113000000.0000000
2009-01-01	-7654000000.0000000
2010-01-01	-3666000000.0000000
2011-01-01	1710000000.0000000
2012-01-01	24681000000.0000000
2013-01-01	30055000000.0000000