Quarter	Billions of US Dollars
1999-01-01	0.00750
1999-04-01	0.05914
1999-07-01	0.03699
1999-10-01	0.08788
2000-01-01	0.08277
2000-04-01	0.17452
2000-07-01	0.16908
2000-10-01	0.72560
2001-01-01	1.03064
2001-04-01	2.31000
2001-07-01	3.50756
2001-10-01	3.75914
2002-01-01	3.93627
2002-04-01	5.01746
2002-07-01	3.58767
2002-10-01	4.14953
2003-01-01	4.13268
2003-04-01	4.39086
2003-07-01	4.71644
2003-10-01	5.04224
2004-01-01	5.13250
2004-04-01	5.08016
2004-07-01	4.43410
2004-10-01	4.22093
2005-01-01	4.18586
2005-04-01	4.09342
2005-07-01	4.26247
2005-10-01	4.20286
2006-01-01	4.29708
2006-04-01	4.38679
2006-07-01	3.47138
2006-10-01	3.46840
2007-01-01	3.25116
2007-04-01	3.48648
2007-07-01	4.28414
2007-10-01	3.95398
2008-01-01	4.08638
2008-04-01	3.86670
2008-07-01	3.26761
2008-10-01	3.05388
2009-01-01	2.86689
2009-04-01	2.92830
2009-07-01	2.90578
2009-10-01	2.77802
2010-01-01	2.45299
2010-04-01	2.32910
2010-07-01	2.39971
2010-10-01	2.20904
2011-01-01	2.07142
2011-04-01	1.90530
2011-07-01	1.78306
2011-10-01	1.72981
2012-01-01	1.60160
2012-04-01	1.46364
2012-07-01	1.49431
2012-10-01	1.47260
2013-01-01	1.43569
2013-04-01	0.98759
2013-07-01	1.01647
2013-10-01	1.02649
2014-01-01	1.03054
2014-04-01	1.03572
2014-07-01	0.98775
2014-10-01	0.91282
2015-01-01	0.76884
2015-04-01	0.77932