Quarter	Billions of US Dollars
1969-10-01	3.240
1970-01-01	3.349
1970-04-01	3.459
1970-07-01	3.570
1970-10-01	3.681
1971-01-01	3.876
1971-04-01	4.072
1971-07-01	4.271
1971-10-01	4.853
1972-01-01	4.926
1972-04-01	4.999
1972-07-01	5.073
1972-10-01	5.146
1973-01-01	5.862
1973-04-01	6.007
1973-07-01	6.547
1973-10-01	6.704
1974-01-01	6.992
1974-04-01	7.284
1974-07-01	7.580
1974-10-01	7.875
1975-01-01	9.172
1975-04-01	9.342
1975-07-01	9.514
1975-10-01	9.686
1976-01-01	4.971
1976-04-01	5.193
1976-07-01	5.416
1976-10-01	5.695
1977-01-01	5.927
1977-04-01	6.148
1977-07-01	6.465
1977-10-01	6.692
1978-01-01	7.292
1978-04-01	7.857
1978-07-01	8.283
1978-10-01	9.084
1979-01-01	9.349
1979-04-01	9.616
1979-07-01	9.887
1979-10-01	10.158
1980-01-01	11.477
1980-04-01	11.524
1980-07-01	11.683
1980-10-01	11.853
1981-01-01	11.569
1981-04-01	11.374
1981-07-01	11.175
1981-10-01	11.864
1982-01-01	12.060
1982-04-01	12.043
1982-07-01	11.498
1982-10-01	11.435
1983-01-01	11.691
1983-04-01	11.247
1983-07-01	10.843
1983-10-01	10.710
1984-01-01	11.167
1984-04-01	10.435
1984-07-01	10.302
1984-10-01	10.259
1985-01-01	10.522
1985-04-01	10.960
1985-07-01	11.325
1985-10-01	11.619
1986-01-01	12.006
1986-04-01	12.496
1986-07-01	12.453
1986-10-01	12.836
1987-01-01	12.859
1987-04-01	13.080
1987-07-01	13.368
1987-10-01	14.375
1988-01-01	14.219
1988-04-01	13.677
1988-07-01	12.982
1988-10-01	13.920
1989-01-01	13.762
1989-04-01	13.241
1989-07-01	14.633
1989-10-01	13.547
1990-01-01	13.141
1990-04-01	14.020
1990-07-01	15.259
1990-10-01	16.529
1991-01-01	13.975
1991-04-01	14.140
1991-07-01	14.654
1991-10-01	15.439
1992-01-01	14.313
1992-04-01	15.350
1992-07-01	15.947
1992-10-01	14.014
1993-01-01	13.905
1993-04-01	13.648
1993-07-01	13.226
1993-10-01	13.412
1994-01-01	13.773
1994-04-01	15.153
1994-07-01	15.547
1994-10-01	16.137
1995-01-01	15.659
1995-04-01	15.966
1995-07-01	16.219
1995-10-01	15.665
1996-01-01	15.422
1996-04-01	15.590
1996-07-01	16.185
1996-10-01	17.722
1997-01-01	17.244
1997-04-01	17.710
1997-07-01	18.031
1997-10-01	18.614
1998-01-01	18.531
1998-04-01	19.434
1998-07-01	20.525
1998-10-01	20.851
1999-01-01	20.032
1999-04-01	20.781
1999-07-01	21.642
1999-10-01	21.600
2000-01-01	21.422
2000-04-01	22.978
2000-07-01	22.148
2000-10-01	24.717
2001-01-01	24.868
2001-04-01	26.501
2001-07-01	28.545
2001-10-01	29.664
2002-01-01	29.680
2002-04-01	35.338
2002-07-01	35.429
2002-10-01	38.688
2003-01-01	40.296
2003-04-01	42.640
2003-07-01	45.492
2003-10-01	53.256
2004-01-01	55.357
2004-04-01	58.063
2004-07-01	60.943
2004-10-01	69.040
2005-01-01	68.282
2005-04-01	67.149
2005-07-01	68.605
2005-10-01	69.836
2006-01-01	69.282
2006-04-01	74.406
2006-07-01	77.710
2006-10-01	88.362
2007-01-01	91.663
2007-04-01	99.214
2007-07-01	106.184
2007-10-01	117.937
2008-01-01	127.152
2008-04-01	135.640
2008-07-01	126.410
2008-10-01	117.954
2009-01-01	113.087
2009-04-01	126.160
2009-07-01	129.025
2009-10-01	131.943
2010-01-01	124.905
2010-04-01	111.019
2010-07-01	122.032
2010-10-01	117.630
2011-01-01	126.733
2011-04-01	129.369
2011-07-01	115.840
2011-10-01	107.886
2012-01-01	116.009
2012-04-01	112.017
2012-07-01	111.775
2012-10-01	113.210
2013-01-01	109.771
2013-04-01	114.418
2013-07-01	115.368
2013-10-01	116.801
2014-01-01	114.996
2014-04-01	115.812
2014-07-01	107.183
2014-10-01	103.573
2015-01-01	94.406
2015-04-01	96.288
2015-07-01	94.258
2015-10-01	92.821
2016-01-01	97.054
2016-04-01	95.844
2016-07-01	93.057
2016-10-01	87.755
2017-01-01	88.996
2017-04-01	93.681
2017-07-01	97.144
2017-10-01	98.133
2018-01-01	100.436