Year	US Dollars, Sum Over Component Sub-periods
1987-01-01	2647000000
1988-01-01	3144180000
1989-01-01	3161170000
1990-01-01	3310610000
1991-01-01	3424050000
1992-01-01	3575730000
1993-01-01	3495460000
1994-01-01	3974880000
1995-01-01	4661560000
1996-01-01	4859530000
1997-01-01	4848120000
1998-01-01	4445220000
1999-01-01	4535000000
2000-01-01	4509480000
2001-01-01	4369130000
2002-01-01	4817590000
2003-01-01	5780630000
2004-01-01	7272960000
2005-01-01	8342350000
2006-01-01	8048580000
2007-01-01	9451330000
2008-01-01	10108210000
2009-01-01	8435570000
2010-01-01	10011030000
2011-01-01	11829160000
2012-01-01	12138650000
2013-01-01	12299360000