Quarter	Billions of US Dollars
1957-01-01	1.341
1957-04-01	1.393
1957-07-01	1.445
1957-10-01	1.497
1958-01-01	1.539
1958-04-01	1.582
1958-07-01	1.626
1958-10-01	1.670
1959-01-01	1.686
1959-04-01	1.703
1959-07-01	1.715
1959-10-01	1.729
1960-01-01	1.816
1960-04-01	1.896
1960-07-01	1.980
1960-10-01	2.058
1961-01-01	2.054
1961-04-01	2.049
1961-07-01	2.071
1961-10-01	2.068
1962-01-01	2.145
1962-04-01	2.215
1962-07-01	2.283
1962-10-01	2.358
1963-01-01	2.435
1963-04-01	2.516
1963-07-01	2.596
1963-10-01	2.676
1964-01-01	2.788
1964-04-01	2.892
1964-07-01	2.996
1964-10-01	3.117
1965-01-01	3.235
1965-04-01	3.353
1965-07-01	3.485
1965-10-01	3.606
1966-01-01	3.646
1966-04-01	3.747
1966-07-01	3.941
1966-10-01	4.119
1967-01-01	4.154
1967-04-01	4.248
1967-07-01	4.313
1967-10-01	4.398
1968-01-01	4.409
1968-04-01	4.647
1968-07-01	4.792
1968-10-01	5.106
1969-01-01	5.201
1969-04-01	5.499
1969-07-01	5.726
1969-10-01	6.240
1970-01-01	6.312
1970-04-01	6.632
1970-07-01	6.935
1970-10-01	7.027
1971-01-01	7.144
1971-04-01	7.518
1971-07-01	8.194
1971-10-01	9.058
1972-01-01	9.776
1972-04-01	10.359
1972-07-01	10.993
1972-10-01	11.878
1973-01-01	13.561
1973-04-01	15.469
1973-07-01	16.159
1973-10-01	16.421
1974-01-01	17.761
1974-04-01	17.841
1974-07-01	17.997
1974-10-01	20.247
1975-01-01	20.728
1975-04-01	24.044
1975-07-01	19.627
1975-10-01	20.790
1976-01-01	19.646
1976-04-01	18.925
1976-07-01	19.928
1976-10-01	22.704
1977-01-01	19.183
1977-04-01	19.832
1977-07-01	20.232
1977-10-01	23.028
1978-01-01	23.395
1978-04-01	22.463
1978-07-01	23.573
1978-10-01	25.527
1979-01-01	24.356
1979-04-01	25.505
1979-07-01	26.588
1979-10-01	28.129
1980-01-01	29.258
1980-04-01	32.089
1980-07-01	32.935
1980-10-01	34.202
1981-01-01	34.357
1981-04-01	33.414
1981-07-01	34.204
1981-10-01	36.451
1982-01-01	35.209
1982-04-01	32.537
1982-07-01	32.761
1982-10-01	34.674
1983-01-01	33.654
1983-04-01	30.211
1983-07-01	30.074
1983-10-01	31.222
1984-01-01	32.009
1984-04-01	30.758
1984-07-01	29.955
1984-10-01	29.680
1985-01-01	29.733
1985-04-01	30.262
1985-07-01	32.130
1985-10-01	34.377
1986-01-01	36.029
1986-04-01	36.886
1986-07-01	38.402
1986-10-01	39.440
1987-01-01	41.987
1987-04-01	41.411
1987-07-01	42.063
1987-10-01	47.496
1988-01-01	46.769
1988-04-01	43.607
1988-07-01	43.412
1988-10-01	47.742
1989-01-01	44.527
1989-04-01	43.731
1989-07-01	46.694
1989-10-01	52.338
1990-01-01	53.567
1990-04-01	57.713
1990-07-01	60.463
1990-10-01	64.241
1991-01-01	60.730
1991-04-01	62.213
1991-07-01	70.671
1991-10-01	78.800
1992-01-01	74.757
1992-04-01	86.521
1992-07-01	92.256
1992-10-01	84.455
1993-01-01	84.315
1993-04-01	82.368
1993-07-01	80.767
1993-10-01	81.463
1994-01-01	84.577
1994-04-01	89.700
1994-07-01	95.138
1994-10-01	99.675
1995-01-01	108.020
1995-04-01	109.280
1995-07-01	108.397
1995-10-01	110.559
1996-01-01	115.376
1996-04-01	115.169
1996-07-01	119.020
1996-10-01	122.662
1997-01-01	118.545
1997-04-01	115.805
1997-07-01	115.222
1997-10-01	117.798
1998-01-01	122.783
1998-04-01	129.758
1998-07-01	144.599
1998-10-01	153.177
1999-01-01	145.504
1999-04-01	149.151
1999-07-01	159.881
1999-10-01	157.211
2000-01-01	158.615
2000-04-01	163.407
2000-07-01	154.023
2000-10-01	168.877
2001-01-01	167.010
2001-04-01	165.089
2001-07-01	183.472
2001-10-01	182.661
2002-01-01	189.255
2002-04-01	218.107
2002-07-01	221.800
2002-10-01	243.266
2003-01-01	265.856
2003-04-01	281.769
2003-07-01	289.272
2003-10-01	318.948
2004-01-01	337.273
2004-04-01	338.462
2004-07-01	345.305
2004-10-01	382.280
2005-01-01	360.941
2005-04-01	344.856
2005-07-01	343.573
2005-10-01	349.856
2006-01-01	349.568
2006-04-01	374.700
2006-07-01	377.573
2006-10-01	410.744
2007-01-01	425.342
2007-04-01	442.817
2007-07-01	472.994
2007-10-01	508.167
2008-01-01	558.553
2008-04-01	574.382
2008-07-01	528.081
2008-10-01	518.430
2009-01-01	506.689
2009-04-01	543.213
2009-07-01	561.223
2009-10-01	548.512
2010-01-01	506.646
2010-04-01	468.811
2010-07-01	519.761
2010-10-01	519.026
2011-01-01	555.094
2011-04-01	570.260
2011-07-01	530.265
2011-10-01	501.467
2012-01-01	526.112
2012-04-01	492.201
2012-07-01	504.818
2012-10-01	514.113
2013-01-01	496.784
2013-04-01	502.569
2013-07-01	513.114
2013-10-01	518.688
2014-01-01	510.745
2014-04-01	496.864
2014-07-01	455.783
2014-10-01	438.015
2015-01-01	385.849
2015-04-01	398.621
2015-07-01	395.793
2015-10-01	383.951
2016-01-01	397.634
2016-04-01	384.525
2016-07-01	384.574
2016-10-01	360.320
2017-01-01	365.069
2017-04-01	388.726
2017-07-01	402.357
2017-10-01	407.979
2018-01-01	416.558