Quarter	Billions of US Dollars
1993-07-01	51.590
1993-10-01	47.853
1994-01-01	56.216
1994-04-01	53.724
1994-07-01	55.864
1994-10-01	47.525
1995-01-01	48.281
1995-04-01	47.035
1995-07-01	46.440
1995-10-01	43.981
1996-01-01	47.767
1996-04-01	56.989
1996-07-01	51.418
1996-10-01	49.935
1997-01-01	53.097
1997-04-01	53.273
1997-07-01	55.575
1997-10-01	49.842
1998-01-01	55.388
1998-04-01	58.071
1998-07-01	62.815
1998-10-01	52.990
1999-01-01	66.289
1999-04-01	60.040
1999-07-01	64.720
1999-10-01	51.774
2000-01-01	61.457
2000-04-01	64.531
2000-07-01	75.130
2000-10-01	80.203
2001-01-01	84.090
2001-04-01	83.150
2001-07-01	73.514
2001-10-01	71.934
2002-01-01	74.225
2002-04-01	75.681
2002-07-01	78.548
2002-10-01	70.904
2003-01-01	81.816
2003-04-01	69.369
2003-07-01	73.874
2003-10-01	82.788
2004-01-01	91.588
2004-04-01	82.835
2004-07-01	96.264
2004-10-01	105.025
2005-01-01	103.455
2005-04-01	104.763
2005-07-01	97.956
2005-10-01	93.641
2006-01-01	121.814
2006-04-01	105.400
2006-07-01	126.053
2006-10-01	139.333
2007-01-01	178.368
2007-04-01	190.920
2007-07-01	190.226
2007-10-01	194.384
2008-01-01	194.170
2008-04-01	169.926
2008-07-01	189.836
2008-10-01	161.794
2009-01-01	138.527
2009-04-01	131.354
2009-07-01	139.377
2009-10-01	127.691
2010-01-01	144.257
2010-04-01	125.187
2010-07-01	125.797
2010-10-01	122.972
2011-01-01	130.366
2011-04-01	112.785
2011-07-01	126.191
2011-10-01	131.121
2012-01-01	134.767
2012-04-01	127.255
2012-07-01	111.764
2012-10-01	141.201
2013-01-01	153.245
2013-04-01	144.697
2013-07-01	141.746
2013-10-01	114.951
2014-01-01	132.355
2014-04-01	142.774
2014-07-01	142.835
2014-10-01	146.349
2015-01-01	149.364
2015-04-01	129.503