Year	US Dollars, Sum Over Component Sub-periods
1997-01-01	246378998886.836
1998-01-01	263498496293.039
1999-01-01	265312225310.094
2000-01-01	268329621380.846
2001-01-01	283017127504.758
2002-01-01	310529027393.818
2003-01-01	372588708234.873
2004-01-01	453635111769.152
2005-01-01	504776759359.950
2006-01-01	554785992217.899
2007-01-01	677839354772.471
2008-01-01	752550897328.119
2009-01-01	694459867788.879
2010-01-01	717454445118.923
2011-01-01	801814136732.329
2012-01-01	790634733617.532