Quarter	Billions of US Dollars
1969-01-01	0.025
1969-04-01	0.025
1969-07-01	0.026
1969-10-01	0.077
1970-01-01	0.077
1970-04-01	0.078
1970-07-01	0.153
1970-10-01	0.152
1971-01-01	0.228
1971-04-01	0.251
1971-07-01	0.307
1971-10-01	0.394
1972-01-01	0.553
1972-04-01	1.101
1972-07-01	1.336
1972-10-01	1.836
1973-01-01	2.027
1973-04-01	2.470
1973-07-01	2.683
1973-10-01	3.151
1974-01-01	3.678
1974-04-01	4.257
1974-07-01	4.634
1974-10-01	5.302
1975-01-01	6.060
1975-04-01	6.952
1975-07-01	7.743
1975-10-01	9.846
1976-01-01	13.083
1976-04-01	14.572
1976-07-01	16.294
1976-10-01	18.413
1977-01-01	19.339
1977-04-01	20.642
1977-07-01	22.321
1977-10-01	23.483
1978-01-01	25.053
1978-04-01	26.806
1978-07-01	28.056
1978-10-01	28.972
1979-01-01	30.611
1979-04-01	31.373
1979-07-01	32.717
1979-10-01	33.063
1980-01-01	32.961
1980-04-01	34.871
1980-07-01	34.660
1980-10-01	35.054
1981-01-01	35.444
1981-04-01	37.360
1981-07-01	39.469
1981-10-01	43.422
1982-01-01	46.170
1982-04-01	47.916
1982-07-01	50.349
1982-10-01	52.330
1983-01-01	53.217
1983-04-01	55.130
1983-07-01	55.251
1983-10-01	55.975
1984-01-01	57.550
1984-04-01	58.060
1984-07-01	58.574
1984-10-01	59.454
1985-01-01	60.310
1985-04-01	61.450
1985-07-01	64.098
1985-10-01	65.491
1986-01-01	69.650
1986-04-01	74.136
1986-07-01	78.514
1986-10-01	80.988
1987-01-01	83.091
1987-04-01	83.429
1987-07-01	83.513
1987-10-01	88.044
1988-01-01	87.000
1988-04-01	87.284
1988-07-01	88.672
1988-10-01	92.754
1989-01-01	94.004
1989-04-01	93.060
1989-07-01	94.457
1989-10-01	96.025
1990-01-01	97.288
1990-04-01	100.096
1990-07-01	101.856
1990-10-01	103.793
1991-01-01	105.355
1991-04-01	109.153
1991-07-01	111.882
1991-10-01	117.490
1992-01-01	115.708
1992-04-01	120.900
1992-07-01	123.612
1992-10-01	122.240
1993-01-01	133.231
1993-04-01	136.491
1993-07-01	139.988
1993-10-01	139.496
1994-01-01	146.893
1994-04-01	150.876
1994-07-01	159.226
1994-10-01	157.036
1995-01-01	162.373
1995-04-01	164.805
1995-07-01	169.001
1995-10-01	166.655
1996-01-01	166.190
1996-04-01	164.729
1996-07-01	166.819
1996-10-01	169.346
1997-01-01	169.914
1997-04-01	173.990
1997-07-01	175.719
1997-10-01	170.964
1998-01-01	175.467
1998-04-01	180.531
1998-07-01	184.488
1998-10-01	191.130
1999-01-01	190.832
1999-04-01	197.183
1999-07-01	199.534
1999-10-01	199.931
2000-01-01	196.864
2000-04-01	192.196
2000-07-01	189.896
2000-10-01	189.456
2001-01-01	189.212
2001-04-01	194.608
2001-07-01	201.462
2001-10-01	206.782
2002-01-01	214.096
2002-04-01	219.440
2002-07-01	219.160
2002-10-01	223.056
2003-01-01	226.231
2003-04-01	239.368
2003-07-01	246.132
2003-10-01	257.170
2004-01-01	256.858
2004-04-01	256.418
2004-07-01	268.493
2004-10-01	283.572
2005-01-01	284.803
2005-04-01	286.080
2005-07-01	290.639
2005-10-01	298.427
2006-01-01	305.190
2006-04-01	312.278
2006-07-01	323.547
2006-10-01	336.282
2007-01-01	355.857
2007-04-01	386.111
2007-07-01	400.566
2007-10-01	422.017
2008-01-01	432.064
2008-04-01	479.840
2008-07-01	475.107
2008-10-01	438.434
2009-01-01	440.942
2009-04-01	481.885
2009-07-01	502.001
2009-10-01	529.314
2010-01-01	536.322
2010-04-01	549.185
2010-07-01	583.268
2010-10-01	610.386
2011-01-01	631.669
2011-04-01	657.022
2011-07-01	632.021
2011-10-01	644.304
2012-01-01	677.232
2012-04-01	663.056
2012-07-01	687.204
2012-10-01	684.576
2013-01-01	678.597
2013-04-01	667.319
2013-07-01	714.061
2013-10-01	732.763
2014-01-01	736.746
2014-04-01	750.189
2014-07-01	743.719
2014-10-01	737.810
2015-01-01	742.222
2015-04-01	746.811