Quarter	Billions of US Dollars
1993-07-01	25.563
1993-10-01	25.645
1994-01-01	26.579
1994-04-01	26.927
1994-07-01	28.097
1994-10-01	29.872
1995-01-01	29.556
1995-04-01	32.505
1995-07-01	32.652
1995-10-01	35.491
1996-01-01	37.057
1996-04-01	38.684
1996-07-01	40.099
1996-10-01	42.583
1997-01-01	44.886
1997-04-01	50.219
1997-07-01	50.140
1997-10-01	53.771
1998-01-01	63.851
1998-04-01	70.116
1998-07-01	72.599
1998-10-01	78.655
1999-01-01	80.791
1999-04-01	89.646
1999-07-01	98.706
1999-10-01	109.986
2000-01-01	116.864
2000-04-01	126.448
2000-07-01	129.315
2000-10-01	138.840
2001-01-01	140.671
2001-04-01	139.983
2001-07-01	140.380
2001-10-01	136.734
2002-01-01	137.753
2002-04-01	150.268
2002-07-01	154.738
2002-10-01	159.467
2003-01-01	159.454
2003-04-01	166.685
2003-07-01	171.561
2003-10-01	187.953
2004-01-01	186.922
2004-04-01	185.447
2004-07-01	183.996
2004-10-01	197.104
2005-01-01	195.335
2005-04-01	188.291
2005-07-01	187.532
2005-10-01	190.371
2006-01-01	205.964
2006-04-01	213.060
2006-07-01	231.823
2006-10-01	241.667
2007-01-01	251.507
2007-04-01	256.298
2007-07-01	268.549
2007-10-01	273.034
2008-01-01	280.610
2008-04-01	295.972
2008-07-01	284.491
2008-10-01	269.351
2009-01-01	272.308
2009-04-01	298.592
2009-07-01	295.335
2009-10-01	299.028
2010-01-01	288.968
2010-04-01	279.880
2010-07-01	298.277
2010-10-01	292.739
2011-01-01	306.032
2011-04-01	322.807
2011-07-01	314.616
2011-10-01	319.837
2012-01-01	338.422
2012-04-01	335.340
2012-07-01	352.635
2012-10-01	358.150
2013-01-01	357.274
2013-04-01	359.300
2013-07-01	386.771
2013-10-01	396.545
2014-01-01	381.256
2014-04-01	387.559
2014-07-01	388.604
2014-10-01	383.265
2015-01-01	363.768
2015-04-01	381.292