Quarter	Billions of US Dollars
1996-10-01	70.978
1997-01-01	74.124
1997-04-01	78.076
1997-07-01	75.213
1997-10-01	78.267
1998-01-01	78.641
1998-04-01	82.615
1998-07-01	77.224
1998-10-01	78.001
1999-01-01	81.105
1999-04-01	75.623
1999-07-01	68.545
1999-10-01	75.718
2000-01-01	73.790
2000-04-01	70.935
2000-07-01	70.706
2000-10-01	71.950
2001-01-01	71.385
2001-04-01	74.293
2001-07-01	75.985
2001-10-01	79.917
2002-01-01	81.424
2002-04-01	81.751
2002-07-01	74.044
2002-10-01	75.577
2003-01-01	75.467
2003-04-01	79.570
2003-07-01	79.662
2003-10-01	83.904
2004-01-01	87.822
2004-04-01	87.874
2004-07-01	92.975
2004-10-01	101.486
2005-01-01	105.633
2005-04-01	108.699
2005-07-01	112.162
2005-10-01	117.053
2006-01-01	119.497
2006-04-01	109.354
2006-07-01	121.398
2006-10-01	134.258
2007-01-01	141.623
2007-04-01	161.134
2007-07-01	162.232
2007-10-01	164.671
2008-01-01	182.739
2008-04-01	176.212
2008-07-01	159.769
2008-10-01	158.507
2009-01-01	149.037
2009-04-01	178.493
2009-07-01	199.614
2009-10-01	196.936
2010-01-01	210.887
2010-04-01	221.037
2010-07-01	242.532
2010-10-01	238.750
2011-01-01	250.641
2011-04-01	268.182
2011-07-01	262.658
2011-10-01	267.897
2012-01-01	293.787
2012-04-01	294.857
2012-07-01	300.607
2012-10-01	312.086
2013-01-01	309.549
2013-04-01	306.592
2013-07-01	323.376
2013-10-01	328.717
2014-01-01	338.795
2014-04-01	364.693
2014-07-01	349.498
2014-10-01	314.872
2015-01-01	305.513
2015-04-01	316.923
2015-07-01	279.332
2015-10-01	280.815
2016-01-01	301.233
2016-04-01	317.823
2016-07-01	327.980
2016-10-01	322.348
2017-01-01	342.040
2017-04-01	331.371
2017-07-01	348.356
2017-10-01	348.168
2018-01-01	378.281