Quarter	Billions of US Dollars
1969-10-01	2.331
1970-01-01	2.592
1970-04-01	2.856
1970-07-01	3.123
1970-10-01	3.390
1971-01-01	3.623
1971-04-01	3.859
1971-07-01	4.098
1971-10-01	4.708
1972-01-01	4.838
1972-04-01	4.968
1972-07-01	5.099
1972-10-01	5.231
1973-01-01	5.994
1973-04-01	6.179
1973-07-01	6.772
1973-10-01	6.971
1974-01-01	7.220
1974-04-01	7.472
1974-07-01	7.726
1974-10-01	7.981
1975-01-01	9.788
1975-04-01	10.459
1975-07-01	11.138
1975-10-01	11.817
1976-01-01	6.083
1976-04-01	6.372
1976-07-01	6.663
1976-10-01	7.022
1977-01-01	7.465
1977-04-01	7.895
1977-07-01	8.453
1977-10-01	8.895
1978-01-01	9.694
1978-04-01	10.447
1978-07-01	11.016
1978-10-01	12.082
1979-01-01	12.458
1979-04-01	12.838
1979-07-01	13.223
1979-10-01	13.608
1980-01-01	15.325
1980-04-01	15.339
1980-07-01	15.501
1980-10-01	15.678
1981-01-01	15.008
1981-04-01	14.567
1981-07-01	14.283
1981-10-01	15.381
1982-01-01	15.029
1982-04-01	14.812
1982-07-01	14.412
1982-10-01	14.807
1983-01-01	14.384
1983-04-01	13.757
1983-07-01	13.178
1983-10-01	12.942
1984-01-01	12.850
1984-04-01	12.123
1984-07-01	11.820
1984-10-01	11.704
1985-01-01	11.550
1985-04-01	11.685
1985-07-01	12.370
1985-10-01	12.692
1986-01-01	13.046
1986-04-01	13.557
1986-07-01	14.580
1986-10-01	15.869
1987-01-01	16.487
1987-04-01	16.587
1987-07-01	17.333
1987-10-01	19.277
1988-01-01	18.628
1988-04-01	17.794
1988-07-01	17.706
1988-10-01	18.702
1989-01-01	18.157
1989-04-01	17.943
1989-07-01	18.612
1989-10-01	20.375
1990-01-01	20.195
1990-04-01	20.981
1990-07-01	22.010
1990-10-01	22.499
1991-01-01	21.359
1991-04-01	22.405
1991-07-01	23.432
1991-10-01	25.499
1992-01-01	24.941
1992-04-01	26.965
1992-07-01	28.018
1992-10-01	27.865
1993-01-01	30.267
1993-04-01	30.351
1993-07-01	30.892
1993-10-01	31.958
1994-01-01	32.597
1994-04-01	34.404
1994-07-01	34.714
1994-10-01	35.106
1995-01-01	36.641
1995-04-01	36.497
1995-07-01	36.138
1995-10-01	35.143
1996-01-01	33.859
1996-04-01	31.845
1996-07-01	31.728
1996-10-01	30.703
1997-01-01	29.191
1997-04-01	28.308
1997-07-01	27.897
1997-10-01	26.805
1998-01-01	26.130
1998-04-01	26.639
1998-07-01	27.430
1998-10-01	28.843
1999-01-01	27.344
1999-04-01	27.410
1999-07-01	28.620
1999-10-01	27.387
2000-01-01	26.318
2000-04-01	26.235
2000-07-01	23.711
2000-10-01	25.682
2001-01-01	24.604
2001-04-01	25.876
2001-07-01	27.386
2001-10-01	28.478
2002-01-01	29.713
2002-04-01	34.897
2002-07-01	36.262
2002-10-01	42.325
2003-01-01	45.120
2003-04-01	45.339
2003-07-01	49.551
2003-10-01	52.623
2004-01-01	55.885
2004-04-01	57.560
2004-07-01	61.098
2004-10-01	67.801
2005-01-01	68.630
2005-04-01	66.438
2005-07-01	66.688
2005-10-01	63.100
2006-01-01	68.152
2006-04-01	69.576
2006-07-01	73.458
2006-10-01	81.324
2007-01-01	85.862
2007-04-01	89.500
2007-07-01	92.615
2007-10-01	96.813
2008-01-01	105.376
2008-04-01	114.104
2008-07-01	101.598
2008-10-01	100.689
2009-01-01	94.124
2009-04-01	103.856
2009-07-01	110.797
2009-10-01	108.606
2010-01-01	106.601
2010-04-01	94.638
2010-07-01	107.330
2010-10-01	104.347
2011-01-01	119.831
2011-04-01	115.360
2011-07-01	105.638
2011-10-01	93.036
2012-01-01	101.109
2012-04-01	96.796
2012-07-01	100.559
2012-10-01	100.789
2013-01-01	97.894
2013-04-01	102.787
2013-07-01	104.222
2013-10-01	106.665
2014-01-01	111.433
2014-04-01	111.852
2014-07-01	101.462
2014-10-01	94.289
2015-01-01	90.121
2015-04-01	92.306
2015-07-01	93.257
2015-10-01	88.426
2016-01-01	95.723
2016-04-01	91.705
2016-07-01	94.195
2016-10-01	89.044
2017-01-01	92.757
2017-04-01	99.443
2017-07-01	102.486
2017-10-01	105.733
2018-01-01	110.484