Year	US Dollars, Sum Over Component Sub-periods
1985-01-01	15557000000
1986-01-01	19813000000
1987-01-01	32932000000
1988-01-01	54526000000
1989-01-01	79437000000
1990-01-01	99942000000
1991-01-01	115169000000
1992-01-01	107282000000
1993-01-01	107627000000
1994-01-01	114815000000
1995-01-01	148297000000
1996-01-01	58777000000
1997-01-01	53619000000
1998-01-01	45825000000
1999-01-01	34595000000
2000-01-01	36790000000
2001-01-01	33860000000
2002-01-01	25699000000
2003-01-01	23953000000
2004-01-01	27630000000
2005-01-01	37757000000
2006-01-01	47589000000
2007-01-01	60806000000
2008-01-01	59435000000
2009-01-01	44016000000
2010-01-01	40301000000
2011-01-01	51510000000
2012-01-01	56322000000
2013-01-01	53455000000