Quarter	Billions of US Dollars
1970-10-01	12.432
1971-01-01	12.658
1971-04-01	13.046
1971-07-01	14.032
1971-10-01	15.298
1972-01-01	15.802
1972-04-01	16.474
1972-07-01	16.835
1972-10-01	17.811
1973-01-01	20.197
1973-04-01	23.378
1973-07-01	23.717
1973-10-01	22.045
1974-01-01	24.190
1974-04-01	25.572
1974-07-01	25.501
1974-10-01	28.494
1975-01-01	30.239
1975-04-01	30.814
1975-07-01	27.928
1975-10-01	29.987
1976-01-01	31.444
1976-04-01	32.150
1976-07-01	35.055
1976-10-01	38.207
1977-01-01	38.375
1977-04-01	40.605
1977-07-01	42.014
1977-10-01	47.776
1978-01-01	50.544
1978-04-01	51.033
1978-07-01	56.138
1978-10-01	61.694
1979-01-01	61.284
1979-04-01	64.023
1979-07-01	69.639
1979-10-01	72.045
1980-01-01	64.790
1980-04-01	73.775
1980-07-01	71.666
1980-10-01	67.340
1981-01-01	62.140
1981-04-01	55.163
1981-07-01	57.348
1981-10-01	57.927
1982-01-01	49.453
1982-04-01	48.223
1982-07-01	45.362
1982-10-01	49.222
1983-01-01	47.597
1983-04-01	45.030
1983-07-01	43.410
1983-10-01	42.554
1984-01-01	44.294
1984-04-01	42.304
1984-07-01	38.943
1984-10-01	38.678
1985-01-01	39.258
1985-04-01	40.259
1985-07-01	45.091
1985-10-01	50.483
1986-01-01	54.017
1986-04-01	58.264
1986-07-01	61.794
1986-10-01	66.596
1987-01-01	73.584
1987-04-01	76.328
1987-07-01	74.818
1987-10-01	88.933
1988-01-01	87.487
1988-04-01	82.871
1988-07-01	82.857
1988-10-01	90.836
1989-01-01	87.516
1989-04-01	90.687
1989-07-01	97.562
1989-10-01	111.778
1990-01-01	112.747
1990-04-01	119.927
1990-07-01	130.120
1990-10-01	139.028
1991-01-01	124.984
1991-04-01	121.698
1991-07-01	134.098
1991-10-01	149.474
1992-01-01	140.029
1992-04-01	155.740
1992-07-01	169.579
1992-10-01	155.841
1993-01-01	154.383
1993-04-01	154.108
1993-07-01	148.316
1993-10-01	144.109
1994-01-01	151.847
1994-04-01	161.978
1994-07-01	163.765
1994-10-01	167.654
1995-01-01	182.563
1995-04-01	188.230
1995-07-01	180.704
1995-10-01	180.229
1996-01-01	176.189
1996-04-01	176.015
1996-07-01	176.195
1996-10-01	175.516
1997-01-01	163.959
1997-04-01	162.746
1997-07-01	160.714
1997-10-01	160.559
1998-01-01	156.065
1998-04-01	164.481
1998-07-01	177.294
1998-10-01	178.976
1999-01-01	172.072
1999-04-01	167.098
1999-07-01	175.849
1999-10-01	168.137
2000-01-01	162.126
2000-04-01	166.463
2000-07-01	155.062
2000-10-01	161.613
2001-01-01	153.634
2001-04-01	149.618
2001-07-01	158.452
2001-10-01	152.302
2002-01-01	152.760
2002-04-01	173.037
2002-07-01	170.179
2002-10-01	179.851
2003-01-01	185.628
2003-04-01	200.667
2003-07-01	203.971
2003-10-01	220.928
2004-01-01	216.428
2004-04-01	216.164
2004-07-01	223.242
2004-10-01	248.691
2005-01-01	239.073
2005-04-01	228.574
2005-07-01	229.976
2005-10-01	232.271
2006-01-01	244.060
2006-04-01	260.216
2006-07-01	262.854
2006-10-01	277.976
2007-01-01	287.825
2007-04-01	300.286
2007-07-01	317.359
2007-10-01	336.608
2008-01-01	369.526
2008-04-01	357.412
2008-07-01	328.854
2008-10-01	297.049
2009-01-01	277.204
2009-04-01	292.827
2009-07-01	300.259
2009-10-01	283.643
2010-01-01	269.092
2010-04-01	246.241
2010-07-01	272.655
2010-10-01	267.922
2011-01-01	289.893
2011-04-01	305.999
2011-07-01	285.882
2011-10-01	262.746
2012-01-01	274.826
2012-04-01	263.054
2012-07-01	263.529
2012-10-01	271.161
2013-01-01	265.628
2013-04-01	277.339
2013-07-01	287.322
2013-10-01	299.457
2014-01-01	300.281
2014-04-01	305.936
2014-07-01	286.055
2014-10-01	286.149
2015-01-01	261.765
2015-04-01	277.434
2015-07-01	281.412
2015-10-01	277.309
2016-01-01	293.625
2016-04-01	289.511
2016-07-01	294.239
2016-10-01	286.604
2017-01-01	295.423
2017-04-01	315.688
2017-07-01	328.332
2017-10-01	343.053
2018-01-01	359.593