Quarter	Billions of US Dollars
1970-01-01	22.336
1970-04-01	23.052
1970-07-01	23.671
1970-10-01	24.951
1971-01-01	25.601
1971-04-01	26.565
1971-07-01	27.756
1971-10-01	30.592
1972-01-01	32.190
1972-04-01	34.540
1972-07-01	36.349
1972-10-01	38.930
1973-01-01	44.514
1973-04-01	47.410
1973-07-01	51.260
1973-10-01	55.056
1974-01-01	55.224
1974-04-01	60.102
1974-07-01	63.358
1974-10-01	69.571
1975-01-01	72.968
1975-04-01	76.754
1975-07-01	75.270
1975-10-01	80.060
1976-01-01	73.828
1976-04-01	77.216
1976-07-01	81.044
1976-10-01	85.794
1977-01-01	89.167
1977-04-01	92.236
1977-07-01	78.644
1977-10-01	86.864
1978-01-01	90.337
1978-04-01	95.415
1978-07-01	106.964
1978-10-01	115.062
1979-01-01	122.198
1979-04-01	130.809
1979-07-01	135.397
1979-10-01	141.125
1980-01-01	134.445
1980-04-01	144.197
1980-07-01	141.915
1980-10-01	139.085
1981-01-01	132.314
1981-04-01	122.608
1981-07-01	125.442
1981-10-01	131.425
1982-01-01	123.020
1982-04-01	123.057
1982-07-01	124.114
1982-10-01	118.233
1983-01-01	111.518
1983-04-01	108.143
1983-07-01	105.199
1983-10-01	106.156
1984-01-01	110.275
1984-04-01	105.590
1984-07-01	96.993
1984-10-01	98.467
1985-01-01	98.468
1985-04-01	100.096
1985-07-01	107.470
1985-10-01	119.472
1986-01-01	125.126
1986-04-01	134.899
1986-07-01	143.337
1986-10-01	152.279
1987-01-01	160.829
1987-04-01	168.283
1987-07-01	179.683
1987-10-01	217.416
1988-01-01	215.724
1988-04-01	205.113
1988-07-01	209.209
1988-10-01	245.360
1989-01-01	241.128
1989-04-01	242.732
1989-07-01	259.384
1989-10-01	293.289
1990-01-01	297.335
1990-04-01	326.887
1990-07-01	349.788
1990-10-01	369.283
1991-01-01	343.023
1991-04-01	330.154
1991-07-01	364.163
1991-10-01	409.573
1992-01-01	378.531
1992-04-01	417.536
1992-07-01	413.713
1992-10-01	368.244
1993-01-01	363.168
1993-04-01	326.641
1993-07-01	323.692
1993-10-01	302.209
1994-01-01	315.145
1994-04-01	326.363
1994-07-01	337.756
1994-10-01	337.321
1995-01-01	352.029
1995-04-01	377.345
1995-07-01	374.234
1995-10-01	389.801
1996-01-01	381.969
1996-04-01	382.255
1996-07-01	384.466
1996-10-01	388.673
1997-01-01	367.163
1997-04-01	366.586
1997-07-01	372.468
1997-10-01	381.595
1998-01-01	378.329
1998-04-01	409.039
1998-07-01	451.477
1998-10-01	471.111
1999-01-01	441.414
1999-04-01	455.313
1999-07-01	478.912
1999-10-01	471.397
2000-01-01	464.598
2000-04-01	487.612
2000-07-01	462.288
2000-10-01	510.730
2001-01-01	491.415
2001-04-01	495.501
2001-07-01	546.804
2001-10-01	548.527
2002-01-01	556.524
2002-04-01	659.627
2002-07-01	668.840
2002-10-01	732.478
2003-01-01	783.522
2003-04-01	860.185
2003-07-01	896.180
2003-10-01	1010.993
2004-01-01	1012.847
2004-04-01	1056.751
2004-07-01	1110.902
2004-10-01	1276.256
2005-01-01	1270.996
2005-04-01	1298.677
2005-07-01	1351.323
2005-10-01	1409.639
2006-01-01	1519.827
2006-04-01	1703.566
2006-07-01	1783.868
2006-10-01	1972.066
2007-01-01	2073.913
2007-04-01	2211.290
2007-07-01	2395.687
2007-10-01	2557.175
2008-01-01	2798.133
2008-04-01	2851.012
2008-07-01	2611.629
2008-10-01	2560.902
2009-01-01	2432.723
2009-04-01	2576.498
2009-07-01	2640.442
2009-10-01	2586.677
2010-01-01	2404.220
2010-04-01	2206.207
2010-07-01	2433.637
2010-10-01	2376.324
2011-01-01	2494.701
2011-04-01	2518.621
2011-07-01	2321.086
2011-10-01	2204.748
2012-01-01	2243.047
2012-04-01	2091.765
2012-07-01	2109.166
2012-10-01	2030.327
2013-01-01	1902.806
2013-04-01	1908.687
2013-07-01	1927.093
2013-10-01	1921.117
2014-01-01	1879.178
2014-04-01	1839.629
2014-07-01	1655.459
2014-10-01	1569.357
2015-01-01	1376.916
2015-04-01	1415.866
2015-07-01	1394.765
2015-10-01	1346.090
2016-01-01	1387.648
2016-04-01	1356.314
2016-07-01	1341.396
2016-10-01	1263.429
2017-01-01	1275.325
2017-04-01	1359.634
2017-07-01	1389.852
2017-10-01	1411.077
2018-01-01	1425.483