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	27.426
1985-10-01	29.318
1986-01-01	28.011
1986-04-01	27.830
1986-07-01	28.621
1986-10-01	28.580
1987-01-01	29.132
1987-04-01	28.782
1987-07-01	28.813
1987-10-01	30.002
1988-01-01	29.965
1988-04-01	30.522
1988-07-01	29.830
1988-10-01	30.649
1989-01-01	31.810
1989-04-01	33.493
1989-07-01	35.410
1989-10-01	37.314
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	48.916
1991-07-01	53.169
1991-10-01	55.717
1992-01-01	61.273
1992-04-01	64.128
1992-07-01	66.640
1992-10-01	64.595
1993-01-01	66.140
1993-04-01	68.853
1993-07-01	70.723
1993-10-01	71.176
1994-01-01	72.551
1994-04-01	75.644
1994-07-01	83.151
1994-10-01	87.861
1995-01-01	94.083
1995-04-01	103.644
1995-07-01	107.583
1995-10-01	115.591
1996-01-01	122.444
1996-04-01	131.969
1996-07-01	140.518
1996-10-01	151.738
1997-01-01	166.279
1997-04-01	173.985
1997-07-01	143.786
1997-10-01	124.849
1998-01-01	132.936
1998-04-01	117.714
1998-07-01	127.304
1998-10-01	127.384
1999-01-01	123.232
1999-04-01	122.194
1999-07-01	124.033
1999-10-01	123.079
2000-01-01	123.262
2000-04-01	125.643
2000-07-01	127.442
2000-10-01	129.996
2001-01-01	129.828
2001-04-01	131.729
2001-07-01	134.342
2001-10-01	135.475
2002-01-01	137.401
2002-04-01	139.585
2002-07-01	141.575
2002-10-01	144.453
2003-01-01	145.595
2003-04-01	148.474
2003-07-01	149.722
2003-10-01	149.924
2004-01-01	155.514
2004-04-01	160.145
2004-07-01	162.196
2004-10-01	162.932
2005-01-01	164.463
2005-04-01	165.827
2005-07-01	173.917
2005-10-01	179.386
2006-01-01	183.839
2006-04-01	187.868
2006-07-01	189.000
2006-10-01	200.848
2007-01-01	205.750
2007-04-01	208.972
2007-07-01	221.674
2007-10-01	228.718
2008-01-01	238.334
2008-04-01	241.735
2008-07-01	244.733
2008-10-01	248.048
2009-01-01	236.736
2009-04-01	246.043
2009-07-01	255.185
2009-10-01	264.659
2010-01-01	281.288
2010-04-01	289.734
2010-07-01	308.600
2010-10-01	321.503
2011-01-01	330.860
2011-04-01	343.506
2011-07-01	336.603
2011-10-01	350.272
2012-01-01	359.584
2012-04-01	365.139
2012-07-01	385.786
2012-10-01	394.278
2013-01-01	396.612
2013-04-01	398.303
2013-07-01	391.815
2013-10-01	404.900
2014-01-01	413.591
2014-04-01	430.955
2014-07-01	428.858
2014-10-01	419.896
2015-01-01	405.680
2015-04-01	408.813
2015-07-01	359.830
2015-10-01	371.960
2016-01-01	414.287
2016-04-01	406.122
2016-07-01	400.164
2016-10-01	380.426
2017-01-01	391.062
2017-04-01	410.564
2017-07-01	421.066
2017-10-01	449.331
2018-01-01	480.270