Quarter	Billions of US Dollars
1957-01-01	0.826
1957-04-01	0.858
1957-07-01	0.890
1957-10-01	0.922
1958-01-01	0.948
1958-04-01	0.975
1958-07-01	1.001
1958-10-01	1.028
1959-01-01	1.038
1959-04-01	1.049
1959-07-01	1.056
1959-10-01	1.065
1960-01-01	1.118
1960-04-01	1.168
1960-07-01	1.220
1960-10-01	1.268
1961-01-01	1.265
1961-04-01	1.262
1961-07-01	1.275
1961-10-01	1.273
1962-01-01	1.321
1962-04-01	1.364
1962-07-01	1.406
1962-10-01	1.452
1963-01-01	1.500
1963-04-01	1.549
1963-07-01	1.599
1963-10-01	1.648
1964-01-01	1.717
1964-04-01	1.781
1964-07-01	1.845
1964-10-01	1.920
1965-01-01	1.992
1965-04-01	2.065
1965-07-01	2.146
1965-10-01	2.221
1966-01-01	2.245
1966-04-01	2.308
1966-07-01	2.427
1966-10-01	2.537
1967-01-01	2.558
1967-04-01	2.616
1967-07-01	2.656
1967-10-01	2.709
1968-01-01	2.715
1968-04-01	2.862
1968-07-01	2.951
1968-10-01	3.145
1969-01-01	3.203
1969-04-01	3.386
1969-07-01	3.526
1969-10-01	3.843
1970-01-01	3.888
1970-04-01	4.085
1970-07-01	4.271
1970-10-01	4.327
1971-01-01	4.399
1971-04-01	4.630
1971-07-01	5.046
1971-10-01	5.579
1972-01-01	6.021
1972-04-01	6.380
1972-07-01	6.770
1972-10-01	7.315
1973-01-01	8.351
1973-04-01	9.527
1973-07-01	9.952
1973-10-01	10.113
1974-01-01	10.938
1974-04-01	10.987
1974-07-01	11.083
1974-10-01	12.469
1975-01-01	12.765
1975-04-01	14.807
1975-07-01	12.087
1975-10-01	12.804
1976-01-01	12.099
1976-04-01	11.655
1976-07-01	12.273
1976-10-01	13.983
1977-01-01	11.814
1977-04-01	12.214
1977-07-01	12.460
1977-10-01	14.182
1978-01-01	14.444
1978-04-01	13.811
1978-07-01	14.363
1978-10-01	15.443
1979-01-01	14.649
1979-04-01	15.289
1979-07-01	15.776
1979-10-01	16.634
1980-01-01	17.312
1980-04-01	18.888
1980-07-01	19.220
1980-10-01	19.845
1981-01-01	19.855
1981-04-01	18.955
1981-07-01	19.274
1981-10-01	20.452
1982-01-01	19.458
1982-04-01	17.545
1982-07-01	17.579
1982-10-01	18.554
1983-01-01	17.698
1983-04-01	15.469
1983-07-01	15.426
1983-10-01	15.725
1984-01-01	16.181
1984-04-01	15.363
1984-07-01	14.868
1984-10-01	14.832
1985-01-01	14.717
1985-04-01	14.995
1985-07-01	15.813
1985-10-01	17.313
1986-01-01	18.465
1986-04-01	19.011
1986-07-01	19.884
1986-10-01	21.051
1987-01-01	22.575
1987-04-01	22.349
1987-07-01	22.475
1987-10-01	25.695
1988-01-01	25.512
1988-04-01	24.016
1988-07-01	23.807
1988-10-01	26.203
1989-01-01	24.437
1989-04-01	23.863
1989-07-01	25.446
1989-10-01	28.765
1990-01-01	29.199
1990-04-01	31.544
1990-07-01	32.720
1990-10-01	35.916
1991-01-01	34.049
1991-04-01	34.382
1991-07-01	39.276
1991-10-01	43.920
1992-01-01	41.974
1992-04-01	48.765
1992-07-01	51.874
1992-10-01	46.950
1993-01-01	47.173
1993-04-01	45.828
1993-07-01	44.511
1993-10-01	43.958
1994-01-01	46.016
1994-04-01	48.994
1994-07-01	51.566
1994-10-01	53.748
1995-01-01	60.218
1995-04-01	62.623
1995-07-01	62.374
1995-10-01	65.152
1996-01-01	64.556
1996-04-01	65.829
1996-07-01	68.882
1996-10-01	71.290
1997-01-01	68.754
1997-04-01	70.214
1997-07-01	72.439
1997-10-01	75.355
1998-01-01	75.707
1998-04-01	82.858
1998-07-01	94.529
1998-10-01	101.866
1999-01-01	99.027
1999-04-01	102.665
1999-07-01	111.303
1999-10-01	110.520
2000-01-01	111.234
2000-04-01	116.658
2000-07-01	111.625
2000-10-01	125.341
2001-01-01	123.438
2001-04-01	122.531
2001-07-01	135.162
2001-10-01	132.847
2002-01-01	134.205
2002-04-01	156.700
2002-07-01	157.519
2002-10-01	171.523
2003-01-01	179.857
2003-04-01	192.661
2003-07-01	196.263
2003-10-01	213.711
2004-01-01	210.392
2004-04-01	213.710
2004-07-01	219.644
2004-10-01	240.486
2005-01-01	232.033
2005-04-01	223.233
2005-07-01	226.140
2005-10-01	225.948
2006-01-01	241.954
2006-04-01	263.726
2006-07-01	266.635
2006-10-01	282.688
2007-01-01	292.509
2007-04-01	308.069
2007-07-01	332.383
2007-10-01	355.224
2008-01-01	392.443
2008-04-01	403.328
2008-07-01	369.222
2008-10-01	368.019
2009-01-01	353.130
2009-04-01	380.182
2009-07-01	395.521
2009-10-01	391.498
2010-01-01	367.198
2010-04-01	337.141
2010-07-01	375.951
2010-10-01	362.590
2011-01-01	386.555
2011-04-01	395.262
2011-07-01	367.543
2011-10-01	346.535
2012-01-01	353.411
2012-04-01	329.301
2012-07-01	330.764
2012-10-01	330.794
2013-01-01	317.395
2013-04-01	321.589
2013-07-01	324.748
2013-10-01	328.437
2014-01-01	325.141
2014-04-01	316.353
2014-07-01	289.083
2014-10-01	267.654
2015-01-01	234.804
2015-04-01	242.635
2015-07-01	240.959
2015-10-01	229.661
2016-01-01	238.475
2016-04-01	231.608
2016-07-01	231.036
2016-10-01	215.809
2017-01-01	216.109
2017-04-01	229.165
2017-07-01	236.351
2017-10-01	239.241
2018-01-01	243.327