Quarter	Billions of US Dollars
1994-07-01	71.702
1994-10-01	83.216
1995-01-01	83.491
1995-04-01	90.508
1995-07-01	82.763
1995-10-01	83.208
1996-01-01	83.783
1996-04-01	82.520
1996-07-01	84.977
1996-10-01	87.217
1997-01-01	90.266
1997-04-01	93.551
1997-07-01	98.271
1997-10-01	96.841
1998-01-01	96.983
1998-04-01	96.284
1998-07-01	96.670
1998-10-01	94.768
1999-01-01	67.179
1999-04-01	66.009
1999-07-01	61.882
1999-10-01	66.484
2000-01-01	70.090
2000-04-01	78.852
2000-07-01	80.723
2000-10-01	77.358
2001-01-01	72.878
2001-04-01	53.613
2001-07-01	48.027
2001-10-01	56.998
2002-01-01	58.390
2002-04-01	49.743
2002-07-01	35.707
2002-10-01	40.370
2003-01-01	41.984
2003-04-01	51.073
2003-07-01	51.715
2003-10-01	54.177
2004-01-01	56.233
2004-04-01	56.099
2004-07-01	65.697
2004-10-01	77.461
2005-01-01	82.789
2005-04-01	98.254
2005-07-01	110.194
2005-10-01	113.999
2006-01-01	124.978
2006-04-01	130.548
2006-07-01	139.084
2006-10-01	151.544
2007-01-01	164.564
2007-04-01	184.244
2007-07-01	209.452
2007-10-01	238.478
2008-01-01	252.337
2008-04-01	293.933
2008-07-01	261.740
2008-10-01	230.495
2009-01-01	233.016
2009-04-01	287.693
2009-07-01	331.220
2009-10-01	363.673
2010-01-01	371.486
2010-04-01	391.565
2010-07-01	455.414
2010-10-01	505.034
2011-01-01	534.460
2011-04-01	578.735
2011-07-01	507.049
2011-10-01	533.314
2012-01-01	562.870
2012-04-01	523.860
2012-07-01	545.791
2012-10-01	566.604
2013-01-01	599.178
2013-04-01	570.163
2013-07-01	583.198
2013-10-01	584.293
2014-01-01	602.377
2014-04-01	624.085
2014-07-01	560.642
2014-10-01	524.615
2015-01-01	446.808
2015-04-01	489.500
2015-07-01	397.713
2015-10-01	418.166
2016-01-01	451.564
2016-04-01	503.202
2016-07-01	494.304
2016-10-01	495.185
2017-01-01	507.332
2017-04-01	480.136
2017-07-01	511.137
2017-10-01	488.746
2018-01-01	489.548