Quarter	Billions of US Dollars
1980-10-01	63.095
1981-01-01	58.465
1981-04-01	51.885
1981-07-01	54.094
1981-10-01	57.932
1982-01-01	49.633
1982-04-01	48.431
1982-07-01	45.824
1982-10-01	50.761
1983-01-01	49.477
1983-04-01	46.923
1983-07-01	45.141
1983-10-01	44.445
1984-01-01	46.377
1984-04-01	43.913
1984-07-01	40.627
1984-10-01	40.549
1985-01-01	41.173
1985-04-01	42.087
1985-07-01	47.287
1985-10-01	51.487
1986-01-01	54.720
1986-04-01	58.602
1986-07-01	61.852
1986-10-01	64.665
1987-01-01	70.625
1987-04-01	71.840
1987-07-01	70.080
1987-10-01	82.327
1988-01-01	80.801
1988-04-01	75.850
1988-07-01	75.793
1988-10-01	82.420
1989-01-01	79.247
1989-04-01	81.016
1989-07-01	86.961
1989-10-01	100.833
1990-01-01	101.486
1990-04-01	107.039
1990-07-01	116.624
1990-10-01	123.164
1991-01-01	111.123
1991-04-01	107.824
1991-07-01	119.203
1991-10-01	133.249
1992-01-01	124.351
1992-04-01	136.719
1992-07-01	149.043
1992-10-01	149.024
1993-01-01	151.328
1993-04-01	148.419
1993-07-01	149.754
1993-10-01	149.011
1994-01-01	159.092
1994-04-01	168.697
1994-07-01	177.463
1994-10-01	180.526
1995-01-01	204.493
1995-04-01	204.143
1995-07-01	198.757
1995-10-01	197.694
1996-01-01	194.580
1996-04-01	190.703
1996-07-01	192.662
1996-10-01	191.857
1997-01-01	184.967
1997-04-01	183.601
1997-07-01	186.395
1997-10-01	189.245
1998-01-01	186.653
1998-04-01	196.303
1998-07-01	217.467
1998-10-01	222.526
1999-01-01	215.037
1999-04-01	216.417
1999-07-01	233.380
1999-10-01	229.228
2000-01-01	228.118
2000-04-01	238.080
2000-07-01	227.551
2000-10-01	251.449
2001-01-01	243.706
2001-04-01	240.729
2001-07-01	266.488
2001-10-01	263.346
2002-01-01	261.376
2002-04-01	298.507
2002-07-01	296.227
2002-10-01	314.695
2003-01-01	326.691
2003-04-01	352.912
2003-07-01	369.983
2003-10-01	412.348
2004-01-01	406.344
2004-04-01	411.168
2004-07-01	427.082
2004-10-01	477.020
2005-01-01	453.564
2005-04-01	423.703
2005-07-01	422.934
2005-10-01	415.277
2006-01-01	430.051
2006-04-01	458.739
2006-07-01	463.969
2006-10-01	486.210
2007-01-01	510.412
2007-04-01	536.404
2007-07-01	583.390
2007-10-01	622.079
2008-01-01	696.317
2008-04-01	723.096
2008-07-01	681.649
2008-10-01	694.761
2009-01-01	684.215
2009-04-01	731.604
2009-07-01	763.643
2009-10-01	758.015
2010-01-01	702.853
2010-04-01	641.730
2010-07-01	695.231
2010-10-01	668.725
2011-01-01	727.559
2011-04-01	764.178
2011-07-01	725.940
2011-10-01	709.028
2012-01-01	743.672
2012-04-01	715.346
2012-07-01	743.231
2012-10-01	766.286
2013-01-01	772.267
2013-04-01	790.046
2013-07-01	798.416
2013-10-01	808.756
2014-01-01	802.249
2014-04-01	802.072
2014-07-01	753.273
2014-10-01	726.245
2015-01-01	661.938
2015-04-01	669.719
2015-07-01	726.386
2015-10-01	691.522
2016-01-01	766.146
2016-04-01	755.868
2016-07-01	754.547
2016-10-01	740.836
2017-01-01	754.136
2017-04-01	797.833
2017-07-01	807.609
2017-10-01	825.451
2018-01-01	849.993