Year	US Dollars, Sum Over Component Sub-periods
1987-01-01	277000000
1988-01-01	309000000
1989-01-01	314000000
1990-01-01	317000000
1991-01-01	322000000
1992-01-01	311000000
1993-01-01	310000000
1994-01-01	612000000
1995-01-01	559000000
1996-01-01	892000000
1997-01-01	680000000
1998-01-01	675000000
1999-01-01	608000000
2000-01-01	633000000
2001-01-01	589000000
2002-01-01	640000000
2003-01-01	850000000
2004-01-01	908000000
2005-01-01	1250000000
2006-01-01	1302000000
2007-01-01	1427000000
2008-01-01	1679000000
2009-01-01	1199000000
2010-01-01	1011000000
2011-01-01	1040000000
2012-01-01	1030000000
2013-01-01	1027000000