Quarter	Billions of US Dollars
1996-04-01	0.03942
1996-07-01	0.03930
1996-10-01	0.03859
1997-01-01	0.03576
1997-04-01	0.02752
1997-07-01	0.02719
1997-10-01	0.02678
1998-01-01	0.02599
1998-04-01	0.02986
1998-07-01	0.03222
1998-10-01	0.02510
1999-01-01	0.02124
1999-04-01	0.03216
1999-07-01	0.03321
1999-10-01	0.02956
2000-01-01	0.02811
2000-04-01	0.02464
2000-07-01	0.02111
2000-10-01	0.02059
2001-01-01	0.01955
2001-04-01	0.01568
2001-07-01	0.01532
2001-10-01	0.01307
2002-01-01	0.01294
2002-04-01	0.11091
2002-07-01	0.10963
2002-10-01	0.11277
2003-01-01	0.11716
2003-04-01	0.11872
2003-07-01	0.12104
2003-10-01	0.12875
2004-01-01	0.12461
2004-04-01	0.15650
2004-07-01	0.15977
2004-10-01	0.17537
2005-01-01	0.16691
2005-04-01	0.15568
2005-07-01	0.15504
2005-10-01	0.15942
2006-01-01	0.16357
2006-04-01	0.17180
2006-07-01	0.17109
2006-10-01	0.17798
2007-01-01	0.17998
2007-04-01	0.04746
2007-07-01	0.04983
2007-10-01	0.08936
2008-01-01	0.09598
2008-04-01	0.09569
2008-07-01	0.08682
2008-10-01	0.08448
2009-01-01	0.08078
2009-04-01	0.08579
2009-07-01	0.08888
2009-10-01	0.08744
2010-01-01	0.08182
2010-04-01	0.07448
2010-07-01	0.08284
2010-10-01	0.08111
2011-01-01	0.08624
2011-04-01	0.08773
2011-07-01	0.08196
2011-10-01	0.07854
2012-01-01	0.08107
2012-04-01	0.07642
2012-07-01	0.07849
2012-10-01	0.08009
2013-01-01	0.07773
2013-04-01	0.07940
2013-07-01	0.08198
2013-10-01	0.08371
2014-01-01	0.08369
2014-04-01	0.04364
2014-07-01	0.04020
2014-10-01	0.03879
2015-01-01	0.03438
2015-04-01	0.03575