Quarter	Billions of US Dollars
1964-04-01	0.289
1964-07-01	0.297
1964-10-01	0.298
1965-01-01	0.383
1965-04-01	0.374
1965-07-01	0.369
1965-10-01	0.367
1966-01-01	0.399
1966-04-01	0.396
1966-07-01	0.404
1966-10-01	0.414
1967-01-01	0.443
1967-04-01	0.447
1967-07-01	0.451
1967-10-01	0.460
1968-01-01	0.518
1968-04-01	0.531
1968-07-01	0.540
1968-10-01	0.551
1969-01-01	0.578
1969-04-01	0.569
1969-07-01	0.573
1969-10-01	0.670
1970-01-01	0.732
1970-04-01	0.754
1970-07-01	0.788
1970-10-01	0.818
1971-01-01	0.872
1971-04-01	0.893
1971-07-01	0.969
1971-10-01	1.008
1972-01-01	1.089
1972-04-01	1.100
1972-07-01	1.215
1972-10-01	1.220
1973-01-01	1.519
1973-04-01	1.692
1973-07-01	1.932
1973-10-01	2.120
1974-01-01	2.347
1974-04-01	2.493
1974-07-01	2.619
1974-10-01	2.706
1975-01-01	2.943
1975-04-01	2.924
1975-07-01	2.694
1975-10-01	2.854
1976-01-01	3.081
1976-04-01	3.262
1976-07-01	3.531
1976-10-01	3.671
1977-01-01	3.988
1977-04-01	4.143
1977-07-01	4.418
1977-10-01	4.759
1978-01-01	5.086
1978-04-01	5.303
1978-07-01	5.888
1978-10-01	6.640
1979-01-01	7.177
1979-04-01	7.939
1979-07-01	8.358
1979-10-01	8.824
1980-01-01	9.547
1980-04-01	11.225
1980-07-01	11.692
1980-10-01	12.075
1981-01-01	12.501
1981-04-01	13.024
1981-07-01	13.615
1981-10-01	14.963
1982-01-01	14.798
1982-04-01	15.279
1982-07-01	15.436
1982-10-01	16.983
1983-01-01	18.430
1983-04-01	18.668
1983-07-01	19.644
1983-10-01	21.178
1984-01-01	22.460
1984-04-01	23.461
1984-07-01	24.260
1984-10-01	24.483
1985-01-01	24.692
1985-04-01	25.742
1985-07-01	27.020
1985-10-01	28.277
1986-01-01	27.224
1986-04-01	27.282
1986-07-01	28.158
1986-10-01	28.096
1987-01-01	28.499
1987-04-01	28.395
1987-07-01	28.480
1987-10-01	29.556
1988-01-01	29.263
1988-04-01	29.960
1988-07-01	29.712
1988-10-01	30.318
1989-01-01	31.452
1989-04-01	33.248
1989-07-01	35.252
1989-10-01	37.006
1990-01-01	37.940
1990-04-01	40.232
1990-07-01	42.852
1990-10-01	46.086
1991-01-01	47.439
1991-04-01	48.891
1991-07-01	53.021
1991-10-01	55.715
1992-01-01	61.270
1992-04-01	63.873
1992-07-01	65.870
1992-10-01	64.110
1993-01-01	65.728
1993-04-01	68.296
1993-07-01	70.191
1993-10-01	70.286
1994-01-01	71.275
1994-04-01	74.079
1994-07-01	81.252
1994-10-01	86.392
1995-01-01	92.038
1995-04-01	101.396
1995-07-01	105.283
1995-10-01	112.143
1996-01-01	118.885
1996-04-01	127.844
1996-07-01	135.933
1996-10-01	146.823
1997-01-01	161.280
1997-04-01	168.427
1997-07-01	138.450
1997-10-01	120.186
1998-01-01	128.709
1998-04-01	113.540
1998-07-01	123.408
1998-10-01	123.897
1999-01-01	120.400
1999-04-01	120.092
1999-07-01	122.125
1999-10-01	121.407
2000-01-01	121.418
2000-04-01	123.558
2000-07-01	125.124
2000-10-01	128.077
2001-01-01	127.945
2001-04-01	130.149
2001-07-01	132.394
2001-10-01	133.562
2002-01-01	135.364
2002-04-01	136.607
2002-07-01	138.295
2002-10-01	140.783
2003-01-01	142.699
2003-04-01	144.947
2003-07-01	148.363
2003-10-01	148.960
2004-01-01	149.992
2004-04-01	153.294
2004-07-01	155.971
2004-10-01	156.963
2005-01-01	159.303
2005-04-01	161.101
2005-07-01	166.439
2005-10-01	169.706
2006-01-01	175.649
2006-04-01	180.077
2006-07-01	181.195
2006-10-01	191.525
2007-01-01	197.054
2007-04-01	201.993
2007-07-01	214.315
2007-10-01	220.589
2008-01-01	233.435
2008-04-01	236.507
2008-07-01	233.975
2008-10-01	238.586
2009-01-01	227.412
2009-04-01	237.418
2009-07-01	247.140
2009-10-01	255.620
2010-01-01	273.256
2010-04-01	280.419
2010-07-01	301.623
2010-10-01	313.089
2011-01-01	324.667
2011-04-01	337.938
2011-07-01	325.825
2011-10-01	339.097
2012-01-01	359.584
2012-04-01	363.683
2012-07-01	385.786
2012-10-01	394.278
2013-01-01	395.584
2013-04-01	396.596
2013-07-01	391.345
2013-10-01	402.962
2014-01-01	412.522
2014-04-01	428.119
2014-07-01	425.939
2014-10-01	411.419
2015-01-01	396.042
2015-04-01	395.441
2015-07-01	347.642
2015-10-01	361.283
2016-01-01	405.788
2016-04-01	399.320
2016-07-01	391.081
2016-10-01	367.541
2017-01-01	378.721
2017-04-01	394.060
2017-07-01	404.821
2017-10-01	431.231
2018-01-01	458.185