Quarter	Billions of US Dollars
1986-01-01	12.664
1986-04-01	13.263
1986-07-01	14.357
1986-10-01	15.133
1987-01-01	15.651
1987-04-01	17.504
1987-07-01	19.709
1987-10-01	22.426
1988-01-01	23.804
1988-04-01	25.195
1988-07-01	26.705
1988-10-01	29.473
1989-01-01	28.391
1989-04-01	27.558
1989-07-01	29.612
1989-10-01	33.533
1990-01-01	31.911
1990-04-01	35.068
1990-07-01	34.558
1990-10-01	43.465
1991-01-01	42.423
1991-04-01	42.580
1991-07-01	46.002
1991-10-01	50.950
1992-01-01	49.714
1992-04-01	51.813
1992-07-01	52.514
1992-10-01	52.580
1993-01-01	54.218
1993-04-01	55.693
1993-07-01	56.608
1993-10-01	60.032
1994-01-01	62.803
1994-04-01	65.660
1994-07-01	69.739
1994-10-01	75.719
1995-01-01	81.712
1995-04-01	85.575
1995-07-01	87.605
1995-10-01	89.202
1996-01-01	93.523
1996-04-01	96.050
1996-07-01	98.776
1996-10-01	102.125
1997-01-01	101.686
1997-04-01	102.100
1997-07-01	107.280
1997-10-01	110.387
1998-01-01	110.444
1998-04-01	112.764
1998-07-01	112.091
1998-10-01	112.531
1999-01-01	117.209
1999-04-01	119.536
1999-07-01	119.779
1999-10-01	128.927
2000-01-01	135.595
2000-04-01	137.169
2000-07-01	142.417
2000-10-01	146.843
2001-01-01	144.970
2001-04-01	148.857
2001-07-01	147.157
2001-10-01	148.764
2002-01-01	142.758
2002-04-01	146.874
2002-07-01	145.942
2002-10-01	150.100
2003-01-01	150.159
2003-04-01	158.227
2003-07-01	155.631
2003-10-01	158.677
2004-01-01	156.485
2004-04-01	158.823
2004-07-01	160.965
2004-10-01	168.329
2005-01-01	168.256
2005-04-01	167.246
2005-07-01	171.393
2005-10-01	173.872
2006-01-01	175.605
2006-04-01	185.912
2006-07-01	193.392
2006-10-01	203.287
2007-01-01	212.437
2007-04-01	218.365
2007-07-01	231.815
2007-10-01	248.906
2008-01-01	269.346
2008-04-01	291.792
2008-07-01	282.577
2008-10-01	250.763
2009-01-01	233.493
2009-04-01	252.549
2009-07-01	266.791
2009-10-01	268.407
2010-01-01	274.059
2010-04-01	269.295
2010-07-01	293.037
2010-10-01	305.422
2011-01-01	315.266
2011-04-01	322.463
2011-07-01	300.174
2011-10-01	296.406
2012-01-01	310.081
2012-04-01	294.473
2012-07-01	297.908
2012-10-01	314.932
2013-01-01	321.286
2013-04-01	326.303
2013-07-01	338.362
2013-10-01	346.900
2014-01-01	345.385
2014-04-01	353.952
2014-07-01	336.686
2014-10-01	318.385
2015-01-01	315.350
2015-04-01	330.516
2015-07-01	322.335
2015-10-01	328.964
2016-01-01	341.485
2016-04-01	342.307
2016-07-01	355.938
2016-10-01	352.976
2017-01-01	373.538
2017-04-01	394.098
2017-07-01	398.922
2017-10-01	403.851
2018-01-01	409.054