Quarter	Billions of US Dollars
1977-10-01	79.741
1978-01-01	85.227
1978-04-01	89.550
1978-07-01	96.409
1978-10-01	105.556
1979-01-01	108.004
1979-04-01	117.124
1979-07-01	130.309
1979-10-01	139.563
1980-01-01	131.966
1980-04-01	150.007
1980-07-01	150.788
1980-10-01	146.437
1981-01-01	139.367
1981-04-01	123.912
1981-07-01	130.748
1981-10-01	131.308
1982-01-01	124.492
1982-04-01	119.148
1982-07-01	119.360
1982-10-01	133.180
1983-01-01	128.626
1983-04-01	127.041
1983-07-01	125.961
1983-10-01	122.614
1984-01-01	133.693
1984-04-01	131.143
1984-07-01	125.026
1984-10-01	125.817
1985-01-01	133.604
1985-04-01	137.532
1985-07-01	160.230
1985-10-01	179.640
1986-01-01	191.630
1986-04-01	201.506
1986-07-01	217.232
1986-10-01	221.868
1987-01-01	244.828
1987-04-01	248.350
1987-07-01	253.994
1987-10-01	301.550
1988-01-01	298.298
1988-04-01	285.584
1988-07-01	282.903
1988-10-01	307.281
1989-01-01	296.030
1989-04-01	296.232
1989-07-01	314.641
1989-10-01	348.700
1990-01-01	365.819
1990-04-01	383.878
1990-07-01	422.248
1990-10-01	442.661
1991-01-01	392.657
1991-04-01	378.856
1991-07-01	419.194
1991-10-01	467.556
1992-01-01	436.729
1992-04-01	479.711
1992-07-01	520.952
1992-10-01	452.986
1993-01-01	468.122
1993-04-01	456.186
1993-07-01	463.767
1993-10-01	455.794
1994-01-01	469.849
1994-04-01	494.067
1994-07-01	513.097
1994-10-01	509.259
1995-01-01	563.103
1995-04-01	567.959
1995-07-01	561.475
1995-10-01	544.838
1996-01-01	532.847
1996-04-01	520.651
1996-07-01	526.247
1996-10-01	525.753
1997-01-01	486.257
1997-04-01	474.217
1997-07-01	473.815
1997-10-01	477.666
1998-01-01	457.337
1998-04-01	475.881
1998-07-01	519.583
1998-10-01	522.176
1999-01-01	483.589
1999-04-01	475.596
1999-07-01	502.885
1999-10-01	478.979
2000-01-01	461.956
2000-04-01	469.692
2000-07-01	437.743
2000-10-01	470.939
2001-01-01	452.345
2001-04-01	440.758
2001-07-01	480.468
2001-10-01	469.407
2002-01-01	469.708
2002-04-01	546.797
2002-07-01	549.131
2002-10-01	592.181
2003-01-01	621.745
2003-04-01	662.227
2003-07-01	690.607
2003-10-01	763.522
2004-01-01	751.393
2004-04-01	773.717
2004-07-01	806.773
2004-10-01	903.812
2005-01-01	876.203
2005-04-01	843.099
2005-07-01	860.932
2005-10-01	869.644
2006-01-01	911.738
2006-04-01	989.129
2006-07-01	1009.435
2006-10-01	1077.355
2007-01-01	1113.371
2007-04-01	1162.131
2007-07-01	1250.207
2007-10-01	1332.750
2008-01-01	1454.769
2008-04-01	1479.289
2008-07-01	1367.660
2008-10-01	1347.784
2009-01-01	1302.952
2009-04-01	1394.816
2009-07-01	1457.421
2009-10-01	1467.656
2010-01-01	1381.148
2010-04-01	1272.447
2010-07-01	1431.666
2010-10-01	1434.018
2011-01-01	1544.698
2011-04-01	1598.514
2011-07-01	1505.421
2011-10-01	1459.691
2012-01-01	1515.499
2012-04-01	1436.529
2012-07-01	1477.793
2012-10-01	1521.157
2013-01-01	1481.822
2013-04-01	1522.267
2013-07-01	1582.714
2013-10-01	1623.884
2014-01-01	1624.933
2014-04-01	1619.683
2014-07-01	1498.649
2014-10-01	1453.597
2015-01-01	1292.087
2015-04-01	1355.335
2015-07-01	1371.349
2015-10-01	1343.637
2016-01-01	1408.935
2016-04-01	1385.892
2016-07-01	1409.531
2016-10-01	1344.206
2017-01-01	1379.770
2017-04-01	1493.176
2017-07-01	1562.097
2017-10-01	1611.232
2018-01-01	1665.272