Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	1501500000
1991-01-01	1601400000
1992-01-01	1525700000
1993-01-01	1218000000
1994-01-01	1328700000
1995-01-01	1594200000
1996-01-01	1866600000
1997-01-01	1845300000
1998-01-01	2270600000
1999-01-01	2310000000
2000-01-01	2368600000
2001-01-01	2073500000
2002-01-01	2077000000
2003-01-01	2588000000
2004-01-01	3403800000
2005-01-01	4581000000
2006-01-01	5722600000
2007-01-01	6148700000
2008-01-01	5381000000
2009-01-01	3320100000
2010-01-01	3606100000
2011-01-01	4506200000
2012-01-01	4441300000
2013-01-01	4431300000