Quarter	Billions of US Dollars
1979-10-01	1.978
1980-01-01	2.100
1980-04-01	2.421
1980-07-01	2.735
1980-10-01	3.064
1981-01-01	3.235
1981-04-01	3.267
1981-07-01	3.521
1981-10-01	3.763
1982-01-01	3.676
1982-04-01	3.392
1982-07-01	3.420
1982-10-01	3.663
1983-01-01	3.494
1983-04-01	3.046
1983-07-01	2.941
1983-10-01	2.873
1984-01-01	2.989
1984-04-01	2.842
1984-07-01	2.784
1984-10-01	2.724
1985-01-01	2.904
1985-04-01	2.968
1985-07-01	3.221
1985-10-01	3.532
1986-01-01	3.977
1986-04-01	4.298
1986-07-01	4.578
1986-10-01	5.048
1987-01-01	5.893
1987-04-01	6.295
1987-07-01	6.510
1987-10-01	7.715
1988-01-01	7.857
1988-04-01	7.552
1988-07-01	7.591
1988-10-01	8.532
1989-01-01	8.430
1989-04-01	8.641
1989-07-01	9.100
1989-10-01	9.842
1990-01-01	10.043
1990-04-01	10.654
1990-07-01	11.599
1990-10-01	12.754
1991-01-01	12.001
1991-04-01	12.104
1991-07-01	13.902
1991-10-01	15.690
1992-01-01	15.389
1992-04-01	17.899
1992-07-01	19.127
1992-10-01	17.264
1993-01-01	19.196
1993-04-01	18.139
1993-07-01	19.110
1993-10-01	18.943
1994-01-01	19.852
1994-04-01	21.929
1994-07-01	24.446
1994-10-01	26.081
1995-01-01	29.720
1995-04-01	31.535
1995-07-01	32.350
1995-10-01	33.821
1996-01-01	34.801
1996-04-01	35.814
1996-07-01	37.851
1996-10-01	39.665
1997-01-01	38.348
1997-04-01	38.999
1997-07-01	40.208
1997-10-01	41.767
1998-01-01	42.208
1998-04-01	46.197
1998-07-01	53.144
1998-10-01	57.131
1999-01-01	54.895
1999-04-01	57.839
1999-07-01	62.608
1999-10-01	63.367
2000-01-01	63.137
2000-04-01	65.812
2000-07-01	62.663
2000-10-01	70.282
2001-01-01	68.083
2001-04-01	67.580
2001-07-01	75.301
2001-10-01	75.919
2002-01-01	77.042
2002-04-01	90.239
2002-07-01	91.846
2002-10-01	100.708
2003-01-01	105.923
2003-04-01	113.245
2003-07-01	118.341
2003-10-01	132.105
2004-01-01	130.625
2004-04-01	134.264
2004-07-01	139.882
2004-10-01	157.371
2005-01-01	152.183
2005-04-01	145.693
2005-07-01	148.294
2005-10-01	149.509
2006-01-01	156.651
2006-04-01	168.570
2006-07-01	172.167
2006-10-01	183.689
2007-01-01	189.117
2007-04-01	196.362
2007-07-01	210.768
2007-10-01	224.374
2008-01-01	244.483
2008-04-01	247.275
2008-07-01	226.417
2008-10-01	221.673
2009-01-01	211.520
2009-04-01	226.237
2009-07-01	235.771
2009-10-01	232.855
2010-01-01	217.692
2010-04-01	199.640
2010-07-01	222.528
2010-10-01	217.994
2011-01-01	230.779
2011-04-01	233.967
2011-07-01	217.104
2011-10-01	206.208
2012-01-01	209.761
2012-04-01	195.741
2012-07-01	198.800
2012-10-01	200.876
2013-01-01	193.154
2013-04-01	195.114
2013-07-01	199.134
2013-10-01	202.077
2014-01-01	199.699
2014-04-01	195.927
2014-07-01	179.207
2014-10-01	171.680
2015-01-01	151.051
2015-04-01	155.964
2015-07-01	155.537
2015-10-01	150.152
2016-01-01	155.815
2016-04-01	151.177
2016-07-01	151.229
2016-10-01	141.778
2017-01-01	143.464
2017-04-01	152.767
2017-07-01	158.142
2017-10-01	160.747
2018-01-01	164.673