Quarter	Millions of US Dollars
2002-01-01	783
2002-04-01	596
2002-07-01	685
2002-10-01	643
2003-01-01	657
2003-04-01	584
2003-07-01	646
2003-10-01	650
2004-01-01	648
2004-04-01	655
2004-07-01	684
2004-10-01	648
2005-01-01	602
2005-04-01	603
2005-07-01	661
2005-10-01	854
2006-01-01	851
2006-04-01	843
2006-07-01	795
2006-10-01	719
2007-01-01	696
2007-04-01	705
2007-07-01	621
2007-10-01	566
2008-01-01	532
2008-04-01	525
2008-07-01	514
2008-10-01	520
2009-01-01	548
2009-04-01	539
2009-07-01	490
2009-10-01	481
2010-01-01	460
2010-04-01	395
2010-07-01	283
2010-10-01	283
2011-01-01	321
2011-04-01	321
2011-07-01	325
2011-10-01	319
2012-01-01	319
2012-04-01	319
2012-07-01	253
2012-10-01	253
2013-01-01	253
2013-04-01	378
2013-07-01	378
2013-10-01	364
2014-01-01	351
2014-04-01	351