Quarter	Billions of US Dollars
1990-10-01	116.366
1991-01-01	116.537
1991-04-01	116.674
1991-07-01	116.793
1991-10-01	117.360
1992-01-01	114.384
1992-04-01	108.588
1992-07-01	105.330
1992-10-01	101.396
1993-01-01	102.503
1993-04-01	101.600
1993-07-01	101.858
1993-10-01	102.275
1994-01-01	108.113
1994-04-01	120.508
1994-07-01	134.056
1994-10-01	100.317
1995-01-01	82.662
1995-04-01	100.068
1995-07-01	107.767
1995-10-01	96.933
1996-01-01	100.777
1996-04-01	101.265
1996-07-01	102.851
1996-10-01	99.788
1997-01-01	100.115
1997-04-01	100.888
1997-07-01	104.259
1997-10-01	101.512
1998-01-01	103.432
1998-04-01	104.888
1998-07-01	98.793
1998-10-01	108.185
1999-01-01	114.827
1999-04-01	119.083
1999-07-01	122.657
1999-10-01	123.891
2000-01-01	129.215
2000-04-01	124.309
2000-07-01	132.268
2000-10-01	133.072
2001-01-01	135.112
2001-04-01	142.283
2001-07-01	136.634
2001-10-01	143.084
2002-01-01	150.825
2002-04-01	140.655
2002-07-01	142.135
2002-10-01	143.930
2003-01-01	143.338
2003-04-01	152.386
2003-07-01	148.035
2003-10-01	148.524
2004-01-01	151.587
2004-04-01	149.218
2004-07-01	153.290
2004-10-01	158.909
2005-01-01	160.823
2005-04-01	169.629
2005-07-01	171.294
2005-10-01	175.280
2006-01-01	174.684
2006-04-01	178.641
2006-07-01	194.098
2006-10-01	196.224
2007-01-01	197.309
2007-04-01	207.138
2007-07-01	211.446
2007-10-01	215.721
2008-01-01	225.271
2008-04-01	236.034
2008-07-01	227.637
2008-10-01	214.640
2009-01-01	217.142
2009-04-01	240.114
2009-07-01	246.686
2009-10-01	254.194
2010-01-01	278.535
2010-04-01	277.788
2010-07-01	288.335
2010-10-01	290.289
2011-01-01	308.273
2011-04-01	320.858
2011-07-01	289.652
2011-10-01	290.734
2012-01-01	330.536
2012-04-01	318.908
2012-07-01	346.225
2012-10-01	341.893
2013-01-01	371.378
2013-04-01	363.074
2013-07-01	369.757
2013-10-01	382.072
2014-01-01	402.014
2014-04-01	415.633
2014-07-01	414.928
2014-10-01	387.515
2015-01-01	384.878
2015-04-01	383.161
2015-07-01	369.828
2015-10-01	373.850
2016-01-01	393.532
2016-04-01	364.050
2016-07-01	361.042
2016-10-01	360.598
2017-01-01	396.423
2017-04-01	410.799
2017-07-01	420.392
2017-10-01	391.409
2018-01-01	431.591