Quarter	Billions of US Dollars
1960-01-01	1.071
1960-04-01	1.033
1960-07-01	1.063
1960-10-01	1.123
1961-01-01	1.323
1961-04-01	1.249
1961-07-01	1.229
1961-10-01	1.188
1962-01-01	1.258
1962-04-01	1.111
1962-07-01	1.162
1962-10-01	1.192
1963-01-01	1.248
1963-04-01	1.216
1963-07-01	1.241
1963-10-01	1.261
1964-01-01	1.436
1964-04-01	1.346
1964-07-01	1.354
1964-10-01	1.348
1965-01-01	1.591
1965-04-01	1.597
1965-07-01	1.619
1965-10-01	1.586
1966-01-01	1.810
1966-04-01	1.727
1966-07-01	1.725
1966-10-01	1.679
1967-01-01	1.852
1967-04-01	1.786
1967-07-01	1.742
1967-10-01	1.347
1968-01-01	1.479
1968-04-01	1.455
1968-07-01	1.463
1968-10-01	1.497
1969-01-01	1.656
1969-04-01	1.645
1969-07-01	1.636
1969-10-01	1.670
1970-01-01	1.925
1970-04-01	1.888
1970-07-01	1.954
1970-10-01	1.970
1971-01-01	2.237
1971-04-01	2.181
1971-07-01	2.252
1971-10-01	2.305
1972-01-01	2.584
1972-04-01	2.533
1972-07-01	2.596
1972-10-01	2.662
1973-01-01	3.434
1973-04-01	3.563
1973-07-01	4.325
1973-10-01	4.484
1974-01-01	5.203
1974-04-01	5.397
1974-07-01	5.062
1974-10-01	4.992
1975-01-01	5.391
1975-04-01	5.119
1975-07-01	4.269
1975-10-01	4.390
1976-01-01	4.601
1976-04-01	4.496
1976-07-01	4.773
1976-10-01	4.907
1977-01-01	5.584
1977-04-01	5.637
1977-07-01	5.925
1977-10-01	6.277
1978-01-01	6.729
1978-04-01	7.021
1978-07-01	7.505
1978-10-01	8.007
1979-01-01	8.356
1979-04-01	8.595
1979-07-01	8.970
1979-10-01	9.166
1980-01-01	9.317
1980-04-01	9.879
1980-07-01	10.266
1980-10-01	10.850
1981-01-01	11.191
1981-04-01	11.457
1981-07-01	11.974
1981-10-01	13.024
1982-01-01	12.412
1982-04-01	13.140
1982-07-01	12.678
1982-10-01	13.577
1983-01-01	12.198
1983-04-01	12.840
1983-07-01	13.465
1983-10-01	16.061
1984-01-01	15.966
1984-04-01	16.572
1984-07-01	14.970
1984-10-01	15.053
1985-01-01	15.553
1985-04-01	17.452
1985-07-01	20.982
1985-10-01	20.998
1986-01-01	24.440
1986-04-01	26.162
1986-07-01	25.436
1986-10-01	28.126
1987-01-01	32.450
1987-04-01	34.951
1987-07-01	38.983
1987-10-01	40.664
1988-01-01	43.016
1988-04-01	42.743
1988-07-01	37.926
1988-10-01	41.399
1989-01-01	40.470
1989-04-01	37.083
1989-07-01	38.869
1989-10-01	40.668
1990-01-01	40.433
1990-04-01	41.158
1990-07-01	44.613
1990-10-01	43.473
1991-01-01	44.389
1991-04-01	45.359
1991-07-01	44.545
1991-10-01	41.748
1992-01-01	43.224
1992-04-01	42.910
1992-07-01	43.760
1992-10-01	42.201
1993-01-01	43.122
1993-04-01	44.703
1993-07-01	47.491
1993-10-01	50.766
1994-01-01	53.027
1994-04-01	56.049
1994-07-01	58.009
1994-10-01	62.941
1995-01-01	65.269
1995-04-01	69.773
1995-07-01	69.914
1995-10-01	75.022
1996-01-01	79.275
1996-04-01	83.232
1996-07-01	84.367
1996-10-01	88.230
1997-01-01	87.880
1997-04-01	87.942
1997-07-01	85.612
1997-10-01	80.689
1998-01-01	76.261
1998-04-01	72.377
1998-07-01	71.121
1998-10-01	76.825
1999-01-01	77.858
1999-04-01	79.339
1999-07-01	79.190
1999-10-01	81.964
2000-01-01	79.670
2000-04-01	77.017
2000-07-01	67.560
2000-10-01	75.032
2001-01-01	70.077
2001-04-01	72.321
2001-07-01	71.276
2001-10-01	74.188
2002-01-01	81.239
2002-04-01	91.010
2002-07-01	89.572
2002-10-01	101.279
2003-01-01	108.780
2003-04-01	117.154
2003-07-01	121.171
2003-10-01	136.535
2004-01-01	143.048
2004-04-01	142.305
2004-07-01	153.586
2004-10-01	172.770
2005-01-01	175.647
2005-04-01	176.714
2005-07-01	181.071
2005-10-01	186.167
2006-01-01	170.926
2006-04-01	175.825
2006-07-01	193.086
2006-10-01	213.149
2007-01-01	225.657
2007-04-01	251.003
2007-07-01	252.094
2007-10-01	263.951
2008-01-01	275.656
2008-04-01	274.788
2008-07-01	246.716
2008-10-01	210.651
2009-01-01	210.669
2009-04-01	239.717
2009-07-01	264.444
2009-10-01	266.019
2010-01-01	260.502
2010-04-01	253.984
2010-07-01	270.902
2010-10-01	285.616
2011-01-01	281.687
2011-04-01	305.168
2011-07-01	281.318
2011-10-01	283.334
2012-01-01	304.719
2012-04-01	297.264
2012-07-01	311.259
2012-10-01	312.167
2013-01-01	320.992
2013-04-01	300.518
2013-07-01	322.814
2013-10-01	323.766
2014-01-01	343.394
2014-04-01	352.767
2014-07-01	315.841
2014-10-01	321.713
2015-01-01	310.245
2015-04-01	283.999
2015-07-01	271.912
2015-10-01	295.595
2016-01-01	304.121
2016-04-01	316.777
2016-07-01	330.027
2016-10-01	322.133
2017-01-01	327.524
2017-04-01	348.800
2017-07-01	349.516
2017-10-01	348.789
2018-01-01	356.837