Year	US Dollars, Sum Over Component Sub-periods
1990-01-01	1583700000
1991-01-01	1549400000
1992-01-01	1524400000
1993-01-01	1399400000
1994-01-01	1609600000
1995-01-01	1800400000
1996-01-01	1884700000
1997-01-01	1848900000
1998-01-01	1919100000
1999-01-01	2000900000
2000-01-01	1893200000
2001-01-01	2012700000
2002-01-01	2230700000
2003-01-01	2380700000
2004-01-01	2883100000
2005-01-01	3100300000
2006-01-01	3483100000
2007-01-01	4775700000
2008-01-01	5305300000
2009-01-01	4050100000
2010-01-01	4589500000
2011-01-01	5343300000
2012-01-01	5056600000
2013-01-01	4998800000