Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	30364770000
1989-01-01	32805580000
1990-01-01	46391300000
1991-01-01	43379520000
1992-01-01	53986490000
1993-01-01	48902680000
1994-01-01	59958840000
1995-01-01	63141970000
1996-01-01	72601140000
1997-01-01	76090270000
1998-01-01	69715500000
1999-01-01	58712100000
2000-01-01	56463200000
2001-01-01	57677960000
2002-01-01	59880400000
2003-01-01	71650060000
2004-01-01	84726320000
2005-01-01	89354050000
2006-01-01	98829260000
2007-01-01	111954320000
2008-01-01	115169640000
2009-01-01	93101540000
2010-01-01	98120280000
2011-01-01	105919280000
2012-01-01	105077420000
2013-01-01	110820180000