Quarter	Billions of US Dollars
1961-01-01	2.610
1961-04-01	2.620
1961-07-01	2.725
1961-10-01	2.885
1962-01-01	3.042
1962-04-01	3.144
1962-07-01	3.240
1962-10-01	3.394
1963-01-01	3.519
1963-04-01	3.617
1963-07-01	3.763
1963-10-01	3.956
1964-01-01	4.190
1964-04-01	4.373
1964-07-01	4.584
1964-10-01	4.721
1965-01-01	4.930
1965-04-01	5.017
1965-07-01	5.188
1965-10-01	5.410
1966-01-01	5.700
1966-04-01	5.812
1966-07-01	5.923
1966-10-01	6.075
1967-01-01	6.323
1967-04-01	6.574
1967-07-01	6.872
1967-10-01	7.240
1968-01-01	7.479
1968-04-01	7.714
1968-07-01	8.006
1968-10-01	8.525
1969-01-01	8.658
1969-04-01	9.039
1969-07-01	9.543
1969-10-01	9.975
1970-01-01	10.457
1970-04-01	10.842
1970-07-01	11.171
1970-10-01	11.631
1971-01-01	11.877
1971-04-01	12.314
1971-07-01	13.540
1971-10-01	14.642
1972-01-01	15.379
1972-04-01	16.376
1972-07-01	16.625
1972-10-01	17.391
1973-01-01	20.181
1973-04-01	23.898
1973-07-01	26.709
1973-10-01	25.396
1974-01-01	27.689
1974-04-01	29.517
1974-07-01	30.693
1974-10-01	34.433
1975-01-01	36.943
1975-04-01	37.268
1975-07-01	34.023
1975-10-01	36.090
1976-01-01	37.474
1976-04-01	39.175
1976-07-01	43.977
1976-10-01	47.785
1977-01-01	49.057
1977-04-01	52.029
1977-07-01	54.357
1977-10-01	62.508
1978-01-01	68.974
1978-04-01	70.595
1978-07-01	77.950
1978-10-01	88.174
1979-01-01	88.797
1979-04-01	91.469
1979-07-01	99.019
1979-10-01	105.658
1980-01-01	97.479
1980-04-01	110.167
1980-07-01	109.852
1980-10-01	104.152
1981-01-01	96.187
1981-04-01	85.779
1981-07-01	88.818
1981-10-01	94.682
1982-01-01	88.847
1982-04-01	87.590
1982-07-01	87.097
1982-10-01	91.571
1983-01-01	89.011
1983-04-01	86.408
1983-07-01	84.181
1983-10-01	81.348
1984-01-01	86.552
1984-04-01	81.051
1984-07-01	74.666
1984-10-01	72.873
1985-01-01	75.349
1985-04-01	76.563
1985-07-01	88.421
1985-10-01	97.579
1986-01-01	105.615
1986-04-01	113.864
1986-07-01	124.814
1986-10-01	133.475
1987-01-01	145.531
1987-04-01	145.705
1987-07-01	143.870
1987-10-01	172.674
1988-01-01	168.999
1988-04-01	157.051
1988-07-01	152.964
1988-10-01	166.738
1989-01-01	160.195
1989-04-01	158.877
1989-07-01	166.640
1989-10-01	186.247
1990-01-01	190.245
1990-04-01	198.078
1990-07-01	213.538
1990-10-01	225.381
1991-01-01	202.904
1991-04-01	193.262
1991-07-01	213.236
1991-10-01	239.821
1992-01-01	225.934
1992-04-01	245.340
1992-07-01	270.520
1992-10-01	239.161
1993-01-01	244.615
1993-04-01	236.011
1993-07-01	247.408
1993-10-01	239.083
1994-01-01	254.431
1994-04-01	271.786
1994-07-01	283.446
1994-10-01	288.821
1995-01-01	333.314
1995-04-01	343.759
1995-07-01	340.026
1995-10-01	345.205
1996-01-01	346.105
1996-04-01	344.553
1996-07-01	351.179
1996-10-01	354.464
1997-01-01	341.554
1997-04-01	339.270
1997-07-01	342.831
1997-10-01	329.503
1998-01-01	339.019
1998-04-01	358.200
1998-07-01	403.052
1998-10-01	415.032
1999-01-01	394.736
1999-04-01	396.848
1999-07-01	418.169
1999-10-01	405.567
2000-01-01	403.562
2000-04-01	415.739
2000-07-01	399.518
2000-10-01	431.615
2001-01-01	429.481
2001-04-01	416.376
2001-07-01	454.299
2001-10-01	438.709
2002-01-01	448.087
2002-04-01	524.651
2002-07-01	517.104
2002-10-01	544.944
2003-01-01	584.747
2003-04-01	619.618
2003-07-01	635.559
2003-10-01	696.386
2004-01-01	683.696
2004-04-01	691.230
2004-07-01	723.315
2004-10-01	803.191
2005-01-01	778.428
2005-04-01	743.718
2005-07-01	757.890
2005-10-01	747.779
2006-01-01	777.626
2006-04-01	834.129
2006-07-01	833.391
2006-10-01	865.207
2007-01-01	893.135
2007-04-01	913.126
2007-07-01	970.508
2007-10-01	1026.076
2008-01-01	1132.476
2008-04-01	1141.260
2008-07-01	1059.489
2008-10-01	991.714
2009-01-01	945.642
2009-04-01	1011.294
2009-07-01	1052.345
2009-10-01	1049.180
2010-01-01	999.855
2010-04-01	915.709
2010-07-01	1043.838
2010-10-01	1048.331
2011-01-01	1170.020
2011-04-01	1202.374
2011-07-01	1117.036
2011-10-01	1045.609
2012-01-01	1079.920
2012-04-01	1044.290
2012-07-01	1079.145
2012-10-01	1089.485
2013-01-01	1073.326
2013-04-01	1087.836
2013-07-01	1103.275
2013-10-01	1122.142
2014-01-01	1115.721
2014-04-01	1091.899
2014-07-01	1000.792
2014-10-01	953.660
2015-01-01	854.352
2015-04-01	878.737
2015-07-01	868.363
2015-10-01	841.928
2016-01-01	905.508
2016-04-01	863.129
2016-07-01	868.340
2016-10-01	858.547
2017-01-01	881.260
2017-04-01	936.405
2017-07-01	984.318
2017-10-01	984.322
2018-01-01	1014.552