Quarter	Billions of US Dollars
1981-01-01	130.388
1981-04-01	130.519
1981-07-01	128.378
1981-10-01	135.619
1982-01-01	137.745
1982-04-01	140.703
1982-07-01	143.991
1982-10-01	155.602
1983-01-01	155.349
1983-04-01	159.040
1983-07-01	162.550
1983-10-01	166.064
1984-01-01	167.860
1984-04-01	167.863
1984-07-01	163.437
1984-10-01	166.387
1985-01-01	175.434
1985-04-01	179.263
1985-07-01	194.138
1985-10-01	201.695
1986-01-01	209.676
1986-04-01	214.727
1986-07-01	216.464
1986-10-01	220.518
1987-01-01	235.825
1987-04-01	243.553
1987-07-01	248.962
1987-10-01	267.479
1988-01-01	278.504
1988-04-01	264.306
1988-07-01	265.766
1988-10-01	272.973
1989-01-01	271.929
1989-04-01	268.779
1989-07-01	275.331
1989-10-01	284.388
1990-01-01	292.826
1990-04-01	298.570
1990-07-01	297.339
1990-10-01	306.924
1991-01-01	293.502
1991-04-01	282.919
1991-07-01	240.564
1991-10-01	251.446
1992-01-01	233.400
1992-04-01	245.601
1992-07-01	255.764
1992-10-01	260.755
1993-01-01	249.093
1993-04-01	255.684
1993-07-01	262.412
1993-10-01	272.985
1994-01-01	283.186
1994-04-01	290.186
1994-07-01	301.989
1994-10-01	312.675
1995-01-01	327.881
1995-04-01	335.990
1995-07-01	322.874
1995-10-01	321.649
1996-01-01	344.443
1996-04-01	339.987
1996-07-01	343.853
1996-10-01	351.518
1997-01-01	365.583
1997-04-01	373.761
1997-07-01	380.025
1997-10-01	363.510
1998-01-01	379.171
1998-04-01	362.956
1998-07-01	376.547
1998-10-01	388.889
1999-01-01	409.321
1999-04-01	410.989
1999-07-01	426.225
1999-10-01	448.546
2000-01-01	466.156
2000-04-01	470.845
2000-07-01	469.408
2000-10-01	479.653
2001-01-01	493.862
2001-04-01	504.406
2001-07-01	511.358
2001-10-01	527.389
2002-01-01	541.999
2002-04-01	565.611
2002-07-01	587.279
2002-10-01	610.977
2003-01-01	638.463
2003-04-01	668.732
2003-07-01	693.797
2003-10-01	721.447
2004-01-01	787.377
2004-04-01	767.589
2004-07-01	796.607
2004-10-01	880.924
2005-01-01	913.002
2005-04-01	945.865
2005-07-01	980.997
2005-10-01	986.846
2006-01-01	1054.793
2006-04-01	1045.936
2006-07-01	1095.218
2006-10-01	1170.895
2007-01-01	1261.327
2007-04-01	1360.833
2007-07-01	1449.437
2007-10-01	1518.656
2008-01-01	1579.660
2008-04-01	1513.902
2008-07-01	1465.038
2008-10-01	1451.338
2009-01-01	1443.930
2009-04-01	1549.260
2009-07-01	1600.506
2009-10-01	1686.829
2010-01-01	1848.093
2010-04-01	1838.952
2010-07-01	1965.202
2010-10-01	2083.361
2011-01-01	2160.823
2011-04-01	2222.703
2011-07-01	2094.698
2011-10-01	2026.632
2012-01-01	2213.305
2012-04-01	2093.222
2012-07-01	2238.354
2012-10-01	2237.191
2013-01-01	2345.394
2013-04-01	2218.043
2013-07-01	2162.329
2013-10-01	2260.648
2014-01-01	2416.097
2014-04-01	2455.775
2014-07-01	2427.285
2014-10-01	2438.008
2015-01-01	2530.357
2015-04-01	2550.756
2015-07-01	2528.326
2015-10-01	2596.740
2016-01-01	2673.943
2016-04-01	2658.391
2016-07-01	2766.359
2016-10-01	2722.094
2017-01-01	2961.244
2017-04-01	2985.504
2017-07-01	3060.181
2017-10-01	3192.093
2018-01-01	3268.083