Quarter	Billions of US Dollars
1992-10-01	63.313
1993-01-01	65.216
1993-04-01	67.248
1993-07-01	69.147
1993-10-01	71.183
1994-01-01	75.117
1994-04-01	76.454
1994-07-01	79.731
1994-10-01	81.820
1995-01-01	83.585
1995-04-01	87.105
1995-07-01	88.014
1995-10-01	88.711
1996-01-01	89.780
1996-04-01	91.877
1996-07-01	93.121
1996-10-01	99.046
1997-01-01	100.219
1997-04-01	101.645
1997-07-01	101.404
1997-10-01	103.718
1998-01-01	105.808
1998-04-01	107.834
1998-07-01	112.207
1998-10-01	114.134
1999-01-01	115.398
1999-04-01	117.191
1999-07-01	120.673
1999-10-01	123.366
2000-01-01	124.447
2000-04-01	125.056
2000-07-01	125.177
2000-10-01	129.958
2001-01-01	129.190
2001-04-01	133.944
2001-07-01	142.920
2001-10-01	144.439
2002-01-01	109.648
2002-04-01	112.614
2002-07-01	129.414
2002-10-01	152.673
2003-01-01	156.149
2003-04-01	169.573
2003-07-01	188.948
2003-10-01	178.158
2004-01-01	179.703
2004-04-01	181.466
2004-07-01	182.104
2004-10-01	192.326
2005-01-01	190.731
2005-04-01	127.328
2005-07-01	126.320
2005-10-01	182.357
2006-01-01	182.023
2006-04-01	185.539
2006-07-01	184.441
2006-10-01	193.804
2007-01-01	193.136
2007-04-01	197.091
2007-07-01	194.531
2007-10-01	205.424
2008-01-01	204.912
2008-04-01	212.179
2008-07-01	207.227
2008-10-01	199.275
2009-01-01	186.378
2009-04-01	192.229
2009-07-01	193.023
2009-10-01	199.812
2010-01-01	206.696
2010-04-01	213.319
2010-07-01	218.781
2010-10-01	204.444
2011-01-01	215.459
2011-04-01	219.973
2011-07-01	218.023
2011-10-01	216.916
2012-01-01	219.967
2012-04-01	225.359
2012-07-01	226.951
2012-10-01	232.855
2013-01-01	230.372
2013-04-01	231.710
2013-07-01	237.004
2013-10-01	239.176
2014-01-01	220.399
2014-04-01	234.781
2014-07-01	236.072
2014-10-01	256.297
2015-01-01	251.914
2015-04-01	258.971
2015-07-01	274.455
2015-10-01	255.129
2016-01-01	282.997
2016-04-01	293.540
2016-07-01	299.946
2016-10-01	287.003
2017-01-01	297.216
2017-04-01	309.317
2017-07-01	315.610
2017-10-01	331.952
2018-01-01	332.983