Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	1583700000
1991-01-01	1549350000
1992-01-01	1524360000
1993-01-01	1399390000
1994-01-01	1609580000
1995-01-01	1800440000
1996-01-01	1884650000
1997-01-01	1848870000
1998-01-01	1919130000
1999-01-01	2000950000
2000-01-01	1893250000
2001-01-01	2012700000
2002-01-01	2230740000
2003-01-01	2380650000
2004-01-01	2883130000
2005-01-01	3100330000
2006-01-01	3483050000
2007-01-01	4775690000
2008-01-01	5305270000
2009-01-01	4050090000
2010-01-01	4589510000
2011-01-01	5343260000
2012-01-01	5056580000
2013-01-01	4998800000