Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	1501550000
1991-01-01	1601370000
1992-01-01	1525700000
1993-01-01	1217970000
1994-01-01	1328650000
1995-01-01	1594220000
1996-01-01	1866640000
1997-01-01	1845290000
1998-01-01	2270650000
1999-01-01	2309970000
2000-01-01	2368610000
2001-01-01	2073480000
2002-01-01	2076980000
2003-01-01	2587970000
2004-01-01	3403800000
2005-01-01	4581040000
2006-01-01	5722630000
2007-01-01	6148720000
2008-01-01	5381020000
2009-01-01	3320070000
2010-01-01	3606130000
2011-01-01	4506250000
2012-01-01	4441330000
2013-01-01	4431320000