Quarter	Billions of US Dollars
1969-10-01	6.308
1970-01-01	6.687
1970-04-01	7.096
1970-07-01	7.513
1970-10-01	7.942
1971-01-01	8.389
1971-04-01	8.870
1971-07-01	9.357
1971-10-01	10.683
1972-01-01	10.913
1972-04-01	11.169
1972-07-01	11.427
1972-10-01	11.678
1973-01-01	13.327
1973-04-01	13.725
1973-07-01	15.040
1973-10-01	15.453
1974-01-01	16.034
1974-04-01	16.656
1974-07-01	17.294
1974-10-01	17.939
1975-01-01	21.387
1975-04-01	22.337
1975-07-01	23.319
1975-10-01	24.291
1976-01-01	12.462
1976-04-01	13.038
1976-07-01	13.635
1976-10-01	14.365
1977-01-01	15.089
1977-04-01	15.821
1977-07-01	16.816
1977-10-01	17.553
1978-01-01	19.065
1978-04-01	20.537
1978-07-01	21.657
1978-10-01	23.745
1979-01-01	24.444
1979-04-01	25.202
1979-07-01	25.954
1979-10-01	26.710
1980-01-01	30.183
1980-04-01	30.335
1980-07-01	30.796
1980-10-01	31.279
1981-01-01	30.226
1981-04-01	29.588
1981-07-01	29.118
1981-10-01	31.168
1982-01-01	31.064
1982-04-01	30.861
1982-07-01	29.778
1982-10-01	30.092
1983-01-01	29.952
1983-04-01	28.839
1983-07-01	27.830
1983-10-01	27.535
1984-01-01	27.998
1984-04-01	26.432
1984-07-01	26.048
1984-10-01	25.907
1985-01-01	26.145
1985-04-01	26.918
1985-07-01	28.313
1985-10-01	29.157
1986-01-01	30.112
1986-04-01	31.419
1986-07-01	32.518
1986-10-01	34.420
1987-01-01	35.033
1987-04-01	35.547
1987-07-01	36.797
1987-10-01	40.176
1988-01-01	39.399
1988-04-01	37.911
1988-07-01	36.851
1988-10-01	39.135
1989-01-01	38.015
1989-04-01	37.041
1989-07-01	39.536
1989-10-01	39.850
1990-01-01	39.084
1990-04-01	41.028
1990-07-01	43.887
1990-10-01	45.683
1991-01-01	40.258
1991-04-01	40.377
1991-07-01	42.102
1991-10-01	44.750
1992-01-01	42.876
1992-04-01	46.075
1992-07-01	47.875
1992-10-01	45.467
1993-01-01	47.730
1993-04-01	47.673
1993-07-01	47.804
1993-10-01	49.015
1994-01-01	49.850
1994-04-01	53.272
1994-07-01	54.175
1994-10-01	55.121
1995-01-01	55.682
1995-04-01	55.605
1995-07-01	55.329
1995-10-01	53.609
1996-01-01	51.971
1996-04-01	49.956
1996-07-01	50.699
1996-10-01	51.277
1997-01-01	48.622
1997-04-01	48.486
1997-07-01	48.163
1997-10-01	47.751
1998-01-01	46.654
1998-04-01	47.759
1998-07-01	49.698
1998-10-01	52.503
1999-01-01	49.567
1999-04-01	50.709
1999-07-01	53.330
1999-10-01	52.705
2000-01-01	51.885
2000-04-01	53.118
2000-07-01	49.968
2000-10-01	54.475
2001-01-01	53.439
2001-04-01	57.147
2001-07-01	61.066
2001-10-01	63.761
2002-01-01	65.307
2002-04-01	76.968
2002-07-01	79.529
2002-10-01	91.081
2003-01-01	96.428
2003-04-01	99.222
2003-07-01	108.606
2003-10-01	120.316
2004-01-01	127.398
2004-04-01	131.917
2004-07-01	140.644
2004-10-01	160.542
2005-01-01	160.718
2005-04-01	157.646
2005-07-01	161.638
2005-10-01	159.059
2006-01-01	163.471
2006-04-01	170.907
2006-07-01	180.415
2006-10-01	203.657
2007-01-01	213.298
2007-04-01	227.061
2007-07-01	241.309
2007-10-01	259.881
2008-01-01	280.732
2008-04-01	301.006
2008-07-01	278.657
2008-10-01	268.262
2009-01-01	249.599
2009-04-01	278.402
2009-07-01	293.343
2009-10-01	293.596
2010-01-01	284.305
2010-04-01	252.958
2010-07-01	283.220
2010-10-01	273.240
2011-01-01	300.283
2011-04-01	301.285
2011-07-01	271.969
2011-10-01	241.588
2012-01-01	257.970
2012-04-01	250.375
2012-07-01	256.700
2012-10-01	259.328
2013-01-01	249.089
2013-04-01	259.575
2013-07-01	263.270
2013-10-01	267.622
2014-01-01	269.274
2014-04-01	273.113
2014-07-01	251.334
2014-10-01	239.914
2015-01-01	224.689
2015-04-01	225.854
2015-07-01	225.487
2015-10-01	216.814
2016-01-01	230.537
2016-04-01	222.890
2016-07-01	224.792
2016-10-01	212.130
2017-01-01	217.574
2017-04-01	230.285
2017-07-01	238.425
2017-10-01	242.393
2018-01-01	248.914