Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	622180000
1991-01-01	1360910000
1992-01-01	1457350000
1993-01-01	1068040000
1994-01-01	855970000
1995-01-01	1441060000
1996-01-01	2615860000
1997-01-01	2709440000
1998-01-01	8856420000
1999-01-01	18210820000
2000-01-01	25785740000
2001-01-01	9658520000
2002-01-01	29364830000
2003-01-01	22803700000
2004-01-01	-10614240000
2005-01-01	-31669630000
2006-01-01	-5545390000
2007-01-01	24712330000
2008-01-01	-16421480000
2009-01-01	25716850000
2010-01-01	42804160000
2011-01-01	23551130000
2012-01-01	38328740000
2013-01-01	35513190000