Quarter	Billions of US Dollars
1960-01-01	0.920
1960-04-01	0.887
1960-07-01	0.913
1960-10-01	0.964
1961-01-01	1.136
1961-04-01	1.072
1961-07-01	1.056
1961-10-01	1.020
1962-01-01	1.080
1962-04-01	0.954
1962-07-01	0.997
1962-10-01	1.023
1963-01-01	1.071
1963-04-01	1.044
1963-07-01	1.065
1963-10-01	1.083
1964-01-01	1.233
1964-04-01	1.155
1964-07-01	1.163
1964-10-01	1.157
1965-01-01	1.366
1965-04-01	1.371
1965-07-01	1.390
1965-10-01	1.362
1966-01-01	1.554
1966-04-01	1.483
1966-07-01	1.482
1966-10-01	1.441
1967-01-01	1.590
1967-04-01	1.534
1967-07-01	1.496
1967-10-01	1.157
1968-01-01	1.270
1968-04-01	1.250
1968-07-01	1.256
1968-10-01	1.285
1969-01-01	1.422
1969-04-01	1.413
1969-07-01	1.405
1969-10-01	1.434
1970-01-01	1.653
1970-04-01	1.621
1970-07-01	1.678
1970-10-01	1.692
1971-01-01	1.921
1971-04-01	1.873
1971-07-01	1.934
1971-10-01	1.979
1972-01-01	2.219
1972-04-01	2.175
1972-07-01	2.229
1972-10-01	2.285
1973-01-01	2.949
1973-04-01	3.060
1973-07-01	3.714
1973-10-01	3.851
1974-01-01	4.468
1974-04-01	4.635
1974-07-01	4.346
1974-10-01	4.287
1975-01-01	4.629
1975-04-01	4.396
1975-07-01	3.666
1975-10-01	3.770
1976-01-01	3.951
1976-04-01	3.861
1976-07-01	4.099
1976-10-01	4.213
1977-01-01	4.795
1977-04-01	4.840
1977-07-01	5.088
1977-10-01	5.390
1978-01-01	5.812
1978-04-01	5.944
1978-07-01	6.606
1978-10-01	7.045
1979-01-01	7.512
1979-04-01	7.509
1979-07-01	7.865
1979-10-01	8.022
1980-01-01	8.134
1980-04-01	8.574
1980-07-01	8.954
1980-10-01	9.297
1981-01-01	9.537
1981-04-01	9.762
1981-07-01	10.301
1981-10-01	10.817
1982-01-01	10.322
1982-04-01	10.905
1982-07-01	10.481
1982-10-01	11.092
1983-01-01	9.639
1983-04-01	10.208
1983-07-01	10.809
1983-10-01	11.508
1984-01-01	11.359
1984-04-01	11.783
1984-07-01	9.858
1984-10-01	9.949
1985-01-01	10.437
1985-04-01	11.748
1985-07-01	14.423
1985-10-01	14.005
1986-01-01	16.149
1986-04-01	17.160
1986-07-01	15.876
1986-10-01	18.060
1987-01-01	20.305
1987-04-01	22.270
1987-07-01	25.030
1987-10-01	26.452
1988-01-01	28.041
1988-04-01	28.616
1988-07-01	26.506
1988-10-01	27.821
1989-01-01	27.247
1989-04-01	25.953
1989-07-01	27.749
1989-10-01	29.067
1990-01-01	28.965
1990-04-01	29.193
1990-07-01	31.314
1990-10-01	30.418
1991-01-01	31.234
1991-04-01	31.352
1991-07-01	31.067
1991-10-01	29.652
1992-01-01	31.123
1992-04-01	30.731
1992-07-01	31.662
1992-10-01	30.522
1993-01-01	31.195
1993-04-01	32.223
1993-07-01	33.617
1993-10-01	34.763
1994-01-01	37.016
1994-04-01	39.306
1994-07-01	40.746
1994-10-01	45.055
1995-01-01	46.668
1995-04-01	49.666
1995-07-01	50.307
1995-10-01	52.575
1996-01-01	56.170
1996-04-01	59.172
1996-07-01	60.732
1996-10-01	63.273
1997-01-01	63.451
1997-04-01	63.505
1997-07-01	61.851
1997-10-01	57.956
1998-01-01	55.095
1998-04-01	52.304
1998-07-01	51.440
1998-10-01	55.584
1999-01-01	56.464
1999-04-01	57.785
1999-07-01	57.771
1999-10-01	59.634
2000-01-01	57.735
2000-04-01	55.878
2000-07-01	48.661
2000-10-01	54.694
2001-01-01	50.462
2001-04-01	52.241
2001-07-01	53.807
2001-10-01	56.027
2002-01-01	59.868
2002-04-01	67.712
2002-07-01	66.434
2002-10-01	76.264
2003-01-01	82.217
2003-04-01	89.302
2003-07-01	93.242
2003-10-01	106.439
2004-01-01	110.873
2004-04-01	109.486
2004-07-01	118.522
2004-10-01	133.730
2005-01-01	136.791
2005-04-01	138.530
2005-07-01	142.101
2005-10-01	145.425
2006-01-01	133.359
2006-04-01	138.080
2006-07-01	151.691
2006-10-01	169.047
2007-01-01	177.429
2007-04-01	199.342
2007-07-01	200.721
2007-10-01	210.227
2008-01-01	218.740
2008-04-01	218.373
2008-07-01	196.603
2008-10-01	169.384
2009-01-01	169.615
2009-04-01	194.162
2009-07-01	215.408
2009-10-01	215.995
2010-01-01	211.377
2010-04-01	205.958
2010-07-01	221.148
2010-10-01	233.091
2011-01-01	229.634
2011-04-01	249.102
2011-07-01	230.859
2011-10-01	234.037
2012-01-01	251.371
2012-04-01	246.797
2012-07-01	259.233
2012-10-01	258.890
2013-01-01	266.528
2013-04-01	251.174
2013-07-01	270.233
2013-10-01	271.167
2014-01-01	286.985
2014-04-01	294.224
2014-07-01	264.337
2014-10-01	269.394
2015-01-01	262.437
2015-04-01	241.144
2015-07-01	231.732
2015-10-01	252.980
2016-01-01	261.275
2016-04-01	273.577
2016-07-01	285.002
2016-10-01	277.483
2017-01-01	282.215
2017-04-01	300.544
2017-07-01	299.470
2017-10-01	298.860
2018-01-01	306.114