Quarter	Billions of US Dollars
1990-10-01	26.492
1991-01-01	28.493
1991-04-01	30.781
1991-07-01	32.974
1991-10-01	35.031
1992-01-01	36.555
1992-04-01	38.023
1992-07-01	39.387
1992-10-01	40.372
1993-01-01	41.640
1993-04-01	43.744
1993-07-01	46.901
1993-10-01	48.052
1994-01-01	50.758
1994-04-01	52.569
1994-07-01	52.757
1994-10-01	52.297
1995-01-01	53.274
1995-04-01	55.935
1995-07-01	57.647
1995-10-01	59.633
1996-01-01	61.846
1996-04-01	65.122
1996-07-01	67.601
1996-10-01	70.944
1997-01-01	76.249
1997-04-01	81.813
1997-07-01	89.238
1997-10-01	89.644
1998-01-01	90.728
1998-04-01	92.907
1998-07-01	93.492
1998-10-01	94.625
1999-01-01	94.784
1999-04-01	95.875
1999-07-01	96.177
1999-10-01	96.095
2000-01-01	97.116
2000-04-01	97.617
2000-07-01	98.561
2000-10-01	99.290
2001-01-01	99.754
2001-04-01	100.984
2001-07-01	101.720
2001-10-01	102.166
2002-01-01	102.400
2002-04-01	102.572
2002-07-01	101.587
2002-10-01	100.671
2003-01-01	98.979
2003-04-01	97.276
2003-07-01	96.997
2003-10-01	96.974
2004-01-01	96.645
2004-04-01	95.716
2004-07-01	95.669
2004-10-01	97.795
2005-01-01	97.952
2005-04-01	99.216
2005-07-01	99.040
2005-10-01	100.028
2006-01-01	98.360
2006-04-01	98.468
2006-07-01	98.104
2006-10-01	99.905
2007-01-01	99.555
2007-04-01	101.249
2007-07-01	105.204
2007-10-01	108.116
2008-01-01	111.275
2008-04-01	114.067
2008-07-01	115.256
2008-10-01	113.069
2009-01-01	110.572
2009-04-01	112.201
2009-07-01	115.499
2009-10-01	118.650
2010-01-01	120.559
2010-04-01	124.124
2010-07-01	129.812
2010-10-01	135.364
2011-01-01	137.823
2011-04-01	142.790
2011-07-01	144.842
2011-10-01	147.059
2012-01-01	146.980
2012-04-01	151.087
2012-07-01	154.515
2012-10-01	161.013
2013-01-01	162.790
2013-04-01	166.978
2013-07-01	168.285
2013-10-01	172.780
2014-01-01	176.433
2014-04-01	180.384
2014-07-01	184.083
2014-10-01	190.779
2015-01-01	196.308
2015-04-01	200.399
2015-07-01	204.744
2015-10-01	207.595
2016-01-01	207.415
2016-04-01	208.484
2016-07-01	211.482
2016-10-01	217.188
2017-01-01	219.875
2017-04-01	226.028
2017-07-01	232.369
2017-10-01	240.262
2018-01-01	245.712