Quarter	Billions of US Dollars
1993-07-01	83.870
1993-10-01	74.640
1994-01-01	72.851
1994-04-01	73.457
1994-07-01	76.259
1994-10-01	74.716
1995-01-01	81.919
1995-04-01	88.886
1995-07-01	85.411
1995-10-01	90.321
1996-01-01	90.184
1996-04-01	88.861
1996-07-01	80.086
1996-10-01	87.845
1997-01-01	94.517
1997-04-01	98.514
1997-07-01	91.437
1997-10-01	82.190
1998-01-01	74.512
1998-04-01	69.215
1998-07-01	69.143
1998-10-01	81.212
1999-01-01	83.059
1999-04-01	90.471
1999-07-01	98.494
1999-10-01	102.114
2000-01-01	99.988
2000-04-01	112.811
2000-07-01	123.564
2000-10-01	148.942
2001-01-01	152.557
2001-04-01	147.921
2001-07-01	146.326
2001-10-01	143.000
2002-01-01	139.986
2002-04-01	146.569
2002-07-01	148.507
2002-10-01	150.934
2003-01-01	153.002
2003-04-01	177.160
2003-07-01	170.006
2003-10-01	182.386
2004-01-01	169.553
2004-04-01	160.393
2004-07-01	156.800
2004-10-01	168.792
2005-01-01	169.204
2005-04-01	174.443
2005-07-01	168.273
2005-10-01	177.564
2006-01-01	183.907
2006-04-01	191.066
2006-07-01	186.683
2006-10-01	164.720
2007-01-01	170.878
2007-04-01	174.386
2007-07-01	168.582
2007-10-01	183.422
2008-01-01	199.149
2008-04-01	212.201
2008-07-01	202.008
2008-10-01	197.964
2009-01-01	173.388
2009-04-01	177.411
2009-07-01	168.431
2009-10-01	168.870
2010-01-01	174.922
2010-04-01	181.872
2010-07-01	195.004
2010-10-01	187.021
2011-01-01	196.580
2011-04-01	200.660
2011-07-01	181.313
2011-10-01	171.596
2012-01-01	174.762
2012-04-01	193.901
2012-07-01	208.208
2012-10-01	217.688
2013-01-01	246.403
2013-04-01	271.043
2013-07-01	286.577
2013-10-01	303.685
2014-01-01	287.583
2014-04-01	264.308
2014-07-01	241.393
2014-10-01	210.588
2015-01-01	194.747
2015-04-01	203.746