Quarter	Billions of US Dollars
1969-10-01	2.348
1970-01-01	2.612
1970-04-01	2.879
1970-07-01	3.149
1970-10-01	3.420
1971-01-01	3.657
1971-04-01	3.897
1971-07-01	4.140
1971-10-01	4.759
1972-01-01	4.890
1972-04-01	5.022
1972-07-01	5.155
1972-10-01	5.288
1973-01-01	6.061
1973-04-01	6.249
1973-07-01	6.850
1973-10-01	7.052
1974-01-01	7.306
1974-04-01	7.564
1974-07-01	7.824
1974-10-01	8.084
1975-01-01	9.910
1975-04-01	10.586
1975-07-01	11.270
1975-10-01	11.953
1976-01-01	6.154
1976-04-01	6.446
1976-07-01	6.741
1976-10-01	7.105
1977-01-01	7.551
1977-04-01	7.985
1977-07-01	8.548
1977-10-01	8.993
1978-01-01	9.800
1978-04-01	10.559
1978-07-01	11.133
1978-10-01	12.208
1979-01-01	12.588
1979-04-01	12.972
1979-07-01	13.360
1979-10-01	13.748
1980-01-01	15.486
1980-04-01	15.501
1980-07-01	15.668
1980-10-01	15.849
1981-01-01	15.181
1981-04-01	14.740
1981-07-01	14.450
1981-10-01	15.557
1982-01-01	15.230
1982-04-01	15.036
1982-07-01	14.646
1982-10-01	15.049
1983-01-01	14.631
1983-04-01	13.992
1983-07-01	13.402
1983-10-01	13.169
1984-01-01	13.069
1984-04-01	12.327
1984-07-01	12.019
1984-10-01	11.896
1985-01-01	11.726
1985-04-01	11.866
1985-07-01	12.555
1985-10-01	12.875
1986-01-01	13.238
1986-04-01	13.753
1986-07-01	14.773
1986-10-01	16.065
1987-01-01	16.677
1987-04-01	16.775
1987-07-01	17.521
1987-10-01	19.489
1988-01-01	18.859
1988-04-01	18.043
1988-07-01	17.963
1988-10-01	19.004
1989-01-01	18.384
1989-04-01	18.153
1989-07-01	18.829
1989-10-01	20.576
1990-01-01	20.439
1990-04-01	21.252
1990-07-01	22.331
1990-10-01	22.751
1991-01-01	21.579
1991-04-01	22.621
1991-07-01	23.679
1991-10-01	25.700
1992-01-01	25.170
1992-04-01	27.211
1992-07-01	28.241
1992-10-01	27.991
1993-01-01	30.463
1993-04-01	30.630
1993-07-01	31.254
1993-10-01	32.281
1994-01-01	32.749
1994-04-01	34.702
1994-07-01	35.249
1994-10-01	35.587
1995-01-01	36.950
1995-04-01	36.757
1995-07-01	36.407
1995-10-01	35.426
1996-01-01	34.199
1996-04-01	32.140
1996-07-01	32.396
1996-10-01	31.538
1997-01-01	29.550
1997-04-01	29.002
1997-07-01	28.380
1997-10-01	27.241
1998-01-01	26.325
1998-04-01	26.552
1998-07-01	27.329
1998-10-01	29.791
1999-01-01	27.785
1999-04-01	28.090
1999-07-01	29.680
1999-10-01	29.023
2000-01-01	28.374
2000-04-01	27.827
2000-07-01	25.491
2000-10-01	26.993
2001-01-01	25.737
2001-04-01	27.283
2001-07-01	28.675
2001-10-01	29.710
2002-01-01	30.934
2002-04-01	35.460
2002-07-01	36.921
2002-10-01	43.463
2003-01-01	46.339
2003-04-01	45.648
2003-07-01	49.978
2003-10-01	51.613
2004-01-01	55.385
2004-04-01	56.078
2004-07-01	60.033
2004-10-01	68.391
2005-01-01	69.821
2005-04-01	68.030
2005-07-01	69.320
2005-10-01	64.698
2006-01-01	69.071
2006-04-01	69.344
2006-07-01	73.517
2006-10-01	82.226
2007-01-01	86.760
2007-04-01	90.589
2007-07-01	93.951
2007-10-01	97.439
2008-01-01	102.661
2008-04-01	110.606
2008-07-01	100.322
2008-10-01	98.801
2009-01-01	89.731
2009-04-01	100.765
2009-07-01	110.698
2009-10-01	108.852
2010-01-01	108.828
2010-04-01	95.314
2010-07-01	109.247
2010-10-01	103.967
2011-01-01	119.896
2011-04-01	115.696
2011-07-01	106.139
2011-10-01	90.181
2012-01-01	98.187
2012-04-01	97.073
2012-07-01	103.308
2012-10-01	105.083
2013-01-01	101.033
2013-04-01	106.347
2013-07-01	108.482
2013-10-01	111.526
2014-01-01	116.244
2014-04-01	120.186
2014-07-01	110.291
2014-10-01	104.456
2015-01-01	102.535
2015-04-01	102.606
2015-07-01	104.537
2015-10-01	98.813
2016-01-01	107.365
2016-04-01	102.014
2016-07-01	105.968
2016-10-01	99.973
2017-01-01	103.711
2017-04-01	110.034
2017-07-01	113.746
2017-10-01	116.562
2018-01-01	120.158