Quarter	Billions of US Dollars
2000-01-01	0.133
2000-04-01	0.238
2000-07-01	0.331
2000-10-01	0.313
2001-01-01	0.500
2001-04-01	0.639
2001-07-01	0.539
2001-10-01	0.669
2002-01-01	0.741
2002-04-01	0.871
2002-07-01	0.821
2002-10-01	1.000
2003-01-01	1.006
2003-04-01	1.144
2003-07-01	1.125
2003-10-01	1.297
2004-01-01	1.302
2004-04-01	1.605
2004-07-01	1.542
2004-10-01	1.730
2005-01-01	2.381
2005-04-01	2.332
2005-07-01	2.187
2005-10-01	2.157
2006-01-01	2.185
2006-04-01	2.314
2006-07-01	2.265
2006-10-01	2.612
2007-01-01	2.818
2007-04-01	2.814
2007-07-01	2.793
2007-10-01	2.889
2008-01-01	3.134
2008-04-01	3.173
2008-07-01	2.785
2008-10-01	3.417
2009-01-01	3.197
2009-04-01	3.516
2009-07-01	3.904
2009-10-01	4.214
2010-01-01	4.279
2010-04-01	4.026
2010-07-01	4.189
2010-10-01	4.055
2011-01-01	4.466
2011-04-01	4.104
2011-07-01	3.551
2011-10-01	3.532
2012-01-01	3.631
2012-04-01	3.424
2012-07-01	3.223
2012-10-01	3.327
2013-01-01	3.837
2013-04-01	3.919
2013-07-01	3.692
2013-10-01	4.179
2014-01-01	4.356
2014-04-01	4.451
2014-07-01	4.160
2014-10-01	3.942
2015-01-01	3.177