Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	3120000
1991-01-01	-29550000
1992-01-01	-1910000
1993-01-01	14130000
1994-01-01	44910000
1995-01-01	48930000
1996-01-01	28190000
1997-01-01	37790000
1998-01-01	-11550000
1999-01-01	-95730000
2000-01-01	-147590000
2001-01-01	-15860000
2002-01-01	-7840000
2003-01-01	-119310000
2004-01-01	-209040000
2005-01-01	-512130000
2006-01-01	-686310000
2007-01-01	-686810000
2008-01-01	-317500000
2009-01-01	291440000
2010-01-01	278640000
2011-01-01	345680000
2012-01-01	201520000
2013-01-01	510700000