Quarter	Billions of US Dollars
1998-10-01	124.083
1999-01-01	115.703
1999-04-01	109.775
1999-07-01	112.425
1999-10-01	100.767
2000-01-01	95.070
2000-04-01	93.938
2000-07-01	87.166
2000-10-01	89.370
2001-01-01	85.735
2001-04-01	82.574
2001-07-01	92.274
2001-10-01	83.498
2002-01-01	82.078
2002-04-01	96.106
2002-07-01	100.526
2002-10-01	103.107
2003-01-01	112.492
2003-04-01	118.443
2003-07-01	118.469
2003-10-01	118.583
2004-01-01	123.125
2004-04-01	123.796
2004-07-01	130.056
2004-10-01	128.766
2005-01-01	125.393
2005-04-01	120.142
2005-07-01	111.263
2005-10-01	99.605
2006-01-01	94.299
2006-04-01	100.147
2006-07-01	101.838
2006-10-01	96.036
2007-01-01	95.565
2007-04-01	92.819
2007-07-01	97.724
2007-10-01	94.773
2008-01-01	105.847
2008-04-01	101.148
2008-07-01	85.960
2008-10-01	118.168
2009-01-01	117.277
2009-04-01	132.053
2009-07-01	144.506
2009-10-01	139.825
2010-01-01	141.958
2010-04-01	142.442
2010-07-01	163.020
2010-10-01	148.886
2011-01-01	163.838
2011-04-01	174.252
2011-07-01	183.017
2011-10-01	168.673
2012-01-01	168.275
2012-04-01	167.047
2012-07-01	181.668
2012-10-01	177.884
2013-01-01	169.649
2013-04-01	175.060
2013-07-01	181.976
2013-10-01	174.325
2014-01-01	178.203
2014-04-01	179.739
2014-07-01	175.469
2014-10-01	166.097
2015-01-01	152.054
2015-04-01	146.869
2015-07-01	147.042
2015-10-01	135.734
2016-01-01	145.532
2016-04-01	147.903
2016-07-01	147.280
2016-10-01	131.327
2017-01-01	130.648
2017-04-01	140.137
2017-07-01	146.611
2017-10-01	144.847
2018-01-01	148.576