Quarter	Billions of US Dollars
1986-01-01	5.150
1986-04-01	5.684
1986-07-01	6.394
1986-10-01	6.929
1987-01-01	7.316
1987-04-01	8.223
1987-07-01	9.362
1987-10-01	10.927
1988-01-01	11.608
1988-04-01	12.293
1988-07-01	13.048
1988-10-01	14.522
1989-01-01	14.017
1989-04-01	13.680
1989-07-01	14.962
1989-10-01	17.218
1990-01-01	16.295
1990-04-01	17.992
1990-07-01	17.680
1990-10-01	22.472
1991-01-01	21.698
1991-04-01	22.076
1991-07-01	23.904
1991-10-01	26.591
1992-01-01	26.035
1992-04-01	27.208
1992-07-01	27.537
1992-10-01	28.098
1993-01-01	29.334
1993-04-01	30.417
1993-07-01	30.994
1993-10-01	33.655
1994-01-01	35.482
1994-04-01	37.734
1994-07-01	40.573
1994-10-01	45.511
1995-01-01	49.544
1995-04-01	52.347
1995-07-01	53.850
1995-10-01	54.978
1996-01-01	58.287
1996-04-01	60.126
1996-07-01	62.323
1996-10-01	64.443
1997-01-01	63.589
1997-04-01	64.269
1997-07-01	67.501
1997-10-01	69.539
1998-01-01	69.855
1998-04-01	71.778
1998-07-01	71.431
1998-10-01	71.426
1999-01-01	74.205
1999-04-01	75.751
1999-07-01	76.065
1999-10-01	81.757
2000-01-01	86.294
2000-04-01	87.350
2000-07-01	91.126
2000-10-01	94.123
2001-01-01	93.171
2001-04-01	96.332
2001-07-01	95.511
2001-10-01	95.822
2002-01-01	92.201
2002-04-01	93.895
2002-07-01	93.199
2002-10-01	95.327
2003-01-01	95.348
2003-04-01	100.713
2003-07-01	98.575
2003-10-01	99.576
2004-01-01	96.608
2004-04-01	96.763
2004-07-01	97.014
2004-10-01	100.754
2005-01-01	98.852
2005-04-01	95.636
2005-07-01	96.653
2005-10-01	97.908
2006-01-01	96.869
2006-04-01	101.959
2006-07-01	105.498
2006-10-01	107.358
2007-01-01	110.714
2007-04-01	111.908
2007-07-01	120.249
2007-10-01	127.697
2008-01-01	141.547
2008-04-01	154.525
2008-07-01	154.092
2008-10-01	142.636
2009-01-01	130.152
2009-04-01	137.709
2009-07-01	143.600
2009-10-01	143.804
2010-01-01	148.183
2010-04-01	145.223
2010-07-01	160.466
2010-10-01	168.600
2011-01-01	175.387
2011-04-01	180.627
2011-07-01	170.190
2011-10-01	168.483
2012-01-01	174.726
2012-04-01	167.701
2012-07-01	169.571
2012-10-01	179.882
2013-01-01	184.799
2013-04-01	186.982
2013-07-01	194.849
2013-10-01	199.785
2014-01-01	201.444
2014-04-01	205.894
2014-07-01	195.127
2014-10-01	187.029
2015-01-01	185.523
2015-04-01	198.893
2015-07-01	194.210
2015-10-01	197.752
2016-01-01	207.462
2016-04-01	206.002
2016-07-01	212.545
2016-10-01	207.950
2017-01-01	221.530
2017-04-01	233.848
2017-07-01	234.191
2017-10-01	239.154
2018-01-01	240.602