Quarter	Billions of US Dollars
1969-10-01	3.960
1970-01-01	4.074
1970-04-01	4.217
1970-07-01	4.363
1970-10-01	4.522
1971-01-01	4.732
1971-04-01	4.973
1971-07-01	5.217
1971-10-01	5.925
1972-01-01	6.023
1972-04-01	6.147
1972-07-01	6.272
1972-10-01	6.390
1973-01-01	7.266
1973-04-01	7.476
1973-07-01	8.190
1973-10-01	8.401
1974-01-01	8.728
1974-04-01	9.092
1974-07-01	9.470
1974-10-01	9.856
1975-01-01	11.476
1975-04-01	11.751
1975-07-01	12.049
1975-10-01	12.337
1976-01-01	6.308
1976-04-01	6.592
1976-07-01	6.894
1976-10-01	7.260
1977-01-01	7.538
1977-04-01	7.837
1977-07-01	8.268
1977-10-01	8.560
1978-01-01	9.265
1978-04-01	9.977
1978-07-01	10.524
1978-10-01	11.537
1979-01-01	11.856
1979-04-01	12.230
1979-07-01	12.594
1979-10-01	12.962
1980-01-01	14.697
1980-04-01	14.834
1980-07-01	15.128
1980-10-01	15.430
1981-01-01	15.045
1981-04-01	14.848
1981-07-01	14.669
1981-10-01	15.611
1982-01-01	15.834
1982-04-01	15.825
1982-07-01	15.132
1982-10-01	15.043
1983-01-01	15.320
1983-04-01	14.847
1983-07-01	14.428
1983-10-01	14.366
1984-01-01	14.930
1984-04-01	14.105
1984-07-01	14.029
1984-10-01	14.011
1985-01-01	14.418
1985-04-01	15.052
1985-07-01	15.759
1985-10-01	16.282
1986-01-01	16.874
1986-04-01	17.666
1986-07-01	17.746
1986-10-01	18.355
1987-01-01	18.356
1987-04-01	18.772
1987-07-01	19.276
1987-10-01	20.687
1988-01-01	20.539
1988-04-01	19.868
1988-07-01	18.888
1988-10-01	20.131
1989-01-01	19.631
1989-04-01	18.888
1989-07-01	20.707
1989-10-01	19.273
1990-01-01	18.645
1990-04-01	19.776
1990-07-01	21.556
1990-10-01	22.932
1991-01-01	18.679
1991-04-01	17.756
1991-07-01	18.422
1991-10-01	19.050
1992-01-01	17.706
1992-04-01	18.864
1992-07-01	19.634
1992-10-01	17.476
1993-01-01	17.267
1993-04-01	17.043
1993-07-01	16.550
1993-10-01	16.734
1994-01-01	17.101
1994-04-01	18.570
1994-07-01	18.926
1994-10-01	19.533
1995-01-01	18.732
1995-04-01	18.848
1995-07-01	18.922
1995-10-01	18.183
1996-01-01	17.771
1996-04-01	17.815
1996-07-01	18.303
1996-10-01	19.739
1997-01-01	19.073
1997-04-01	19.484
1997-07-01	19.783
1997-10-01	20.511
1998-01-01	20.330
1998-04-01	21.207
1998-07-01	22.369
1998-10-01	22.712
1999-01-01	21.782
1999-04-01	22.619
1999-07-01	23.650
1999-10-01	23.682
2000-01-01	23.512
2000-04-01	25.291
2000-07-01	24.476
2000-10-01	27.482
2001-01-01	27.702
2001-04-01	29.864
2001-07-01	32.391
2001-10-01	34.051
2002-01-01	34.373
2002-04-01	41.509
2002-07-01	42.608
2002-10-01	47.618
2003-01-01	50.089
2003-04-01	53.574
2003-07-01	58.628
2003-10-01	68.703
2004-01-01	72.013
2004-04-01	75.839
2004-07-01	80.611
2004-10-01	92.151
2005-01-01	90.896
2005-04-01	89.616
2005-07-01	92.319
2005-10-01	94.361
2006-01-01	94.400
2006-04-01	101.563
2006-07-01	106.898
2006-10-01	121.431
2007-01-01	126.538
2007-04-01	136.472
2007-07-01	147.358
2007-10-01	162.442
2008-01-01	178.071
2008-04-01	190.400
2008-07-01	178.334
2008-10-01	169.461
2009-01-01	159.868
2009-04-01	177.637
2009-07-01	182.645
2009-10-01	184.744
2010-01-01	175.477
2010-04-01	157.644
2010-07-01	173.973
2010-10-01	169.273
2011-01-01	180.387
2011-04-01	185.589
2011-07-01	165.830
2011-10-01	151.406
2012-01-01	159.783
2012-04-01	153.302
2012-07-01	153.392
2012-10-01	154.245
2013-01-01	148.055
2013-04-01	153.228
2013-07-01	154.788
2013-10-01	156.096
2014-01-01	153.030
2014-04-01	152.927
2014-07-01	141.043
2014-10-01	135.458
2015-01-01	122.154
2015-04-01	123.248
2015-07-01	120.950
2015-10-01	118.001
2016-01-01	123.172
2016-04-01	120.876
2016-07-01	118.824
2016-10-01	112.157
2017-01-01	113.862
2017-04-01	120.252
2017-07-01	124.679
2017-10-01	125.831
2018-01-01	128.756