Year	US Dollars, Sum Over Component Sub-periods
1997-01-01	843627078065.138
1998-01-01	865205588846.752
1999-01-01	854777983964.769
2000-01-01	898676599339.529
2001-01-01	921508115974.477
2002-01-01	996447285750.189
2003-01-01	1170927235240.400
2004-01-01	1406912189515.750
2005-01-01	1523268603386.670
2006-01-01	1753340027613.910
2007-01-01	2079785532575.090
2008-01-01	2322514711795.020
2009-01-01	1809674797689.200
2010-01-01	2075145080293.580
2011-01-01	2468772653534.180
2012-01-01	2457803388959.110