Quarter	Billions of US Dollars
1978-10-01	18.013
1979-01-01	18.492
1979-04-01	19.374
1979-07-01	21.031
1979-10-01	23.100
1980-01-01	22.515
1980-04-01	21.938
1980-07-01	27.655
1980-10-01	30.856
1981-01-01	33.175
1981-04-01	35.808
1981-07-01	34.388
1981-10-01	38.966
1982-01-01	41.271
1982-04-01	43.955
1982-07-01	43.434
1982-10-01	44.022
1983-01-01	44.159
1983-04-01	42.644
1983-07-01	40.578
1983-10-01	41.372
1984-01-01	41.871
1984-04-01	42.664
1984-07-01	43.156
1984-10-01	44.051
1985-01-01	44.677
1985-04-01	45.726
1985-07-01	46.584
1985-10-01	46.624
1986-01-01	48.727
1986-04-01	50.318
1986-07-01	52.748
1986-10-01	54.912
1987-01-01	59.350
1987-04-01	61.009
1987-07-01	66.976
1987-10-01	69.369
1988-01-01	70.576
1988-04-01	75.098
1988-07-01	78.456
1988-10-01	84.033
1989-01-01	94.267
1989-04-01	98.237
1989-07-01	104.436
1989-10-01	109.100
1990-01-01	111.811
1990-04-01	117.986
1990-07-01	121.940
1990-10-01	129.840
1991-01-01	131.005
1991-04-01	126.953
1991-07-01	132.545
1991-10-01	136.957
1992-01-01	141.143
1992-04-01	147.678
1992-07-01	151.672
1992-10-01	151.210
1993-01-01	162.012
1993-04-01	166.045
1993-07-01	173.676
1993-10-01	177.617
1994-01-01	186.569
1994-04-01	194.769
1994-07-01	199.847
1994-10-01	203.039
1995-01-01	209.637
1995-04-01	219.015
1995-07-01	221.886
1995-10-01	227.388
1996-01-01	234.333
1996-04-01	246.117
1996-07-01	253.139
1996-10-01	263.042
1997-01-01	279.974
1997-04-01	299.924
1997-07-01	314.261
1997-10-01	314.552
1998-01-01	310.401
1998-04-01	309.098
1998-07-01	305.957
1998-10-01	296.801
1999-01-01	288.934
1999-04-01	275.759
1999-07-01	272.192
1999-10-01	268.919
2000-01-01	269.207
2000-04-01	265.725
2000-07-01	276.927
2000-10-01	271.148
2001-01-01	272.188
2001-04-01	268.133
2001-07-01	266.121
2001-10-01	262.590
2002-01-01	260.414
2002-04-01	257.406
2002-07-01	254.234
2002-10-01	252.883
2003-01-01	251.737
2003-04-01	254.022
2003-07-01	254.331
2003-10-01	255.526
2004-01-01	261.125
2004-04-01	261.072
2004-07-01	264.480
2004-10-01	273.892
2005-01-01	277.651
2005-04-01	291.576
2005-07-01	294.047
2005-10-01	301.112
2006-01-01	304.390
2006-04-01	313.095
2006-07-01	318.564
2006-10-01	323.002
2007-01-01	337.360
2007-04-01	358.621
2007-07-01	380.743
2007-10-01	373.844
2008-01-01	392.141
2008-04-01	407.679
2008-07-01	417.176
2008-10-01	399.466
2009-01-01	382.298
2009-04-01	393.302
2009-07-01	399.722
2009-10-01	393.039
2010-01-01	413.455
2010-04-01	440.954
2010-07-01	482.456
2010-10-01	487.842
2011-01-01	527.385
2011-04-01	550.351
2011-07-01	565.231
2011-10-01	559.440
2012-01-01	573.758
2012-04-01	580.560
2012-07-01	589.178
2012-10-01	596.390
2013-01-01	621.215
2013-04-01	664.525
2013-07-01	686.068
2013-10-01	688.587
2014-01-01	736.499
2014-04-01	778.302
2014-07-01	788.251
2014-10-01	788.384
2015-01-01	834.165
2015-04-01	837.939
2015-07-01	836.964
2015-10-01	838.105
2016-01-01	842.467
2016-04-01	851.972
2016-07-01	865.795
2016-10-01	895.700
2017-01-01	931.435
2017-04-01	981.713
2017-07-01	1002.922
2017-10-01	1030.853
2018-01-01	1058.492