Quarter	Billions of US Dollars
1996-10-01	14.175
1997-01-01	16.361
1997-04-01	17.414
1997-07-01	17.022
1997-10-01	17.472
1998-01-01	17.803
1998-04-01	19.006
1998-07-01	18.603
1998-10-01	18.930
1999-01-01	20.554
1999-04-01	20.877
1999-07-01	20.726
1999-10-01	23.718
2000-01-01	24.902
2000-04-01	25.886
2000-07-01	26.643
2000-10-01	28.120
2001-01-01	28.654
2001-04-01	30.495
2001-07-01	32.047
2001-10-01	34.558
2002-01-01	35.137
2002-04-01	35.450
2002-07-01	33.565
2002-10-01	34.315
2003-01-01	35.553
2003-04-01	37.531
2003-07-01	38.483
2003-10-01	40.764
2004-01-01	42.948
2004-04-01	42.679
2004-07-01	45.472
2004-10-01	49.328
2005-01-01	52.733
2005-04-01	53.543
2005-07-01	55.355
2005-10-01	58.391
2006-01-01	59.835
2006-04-01	54.225
2006-07-01	58.231
2006-10-01	63.102
2007-01-01	65.113
2007-04-01	73.235
2007-07-01	72.957
2007-10-01	72.264
2008-01-01	79.192
2008-04-01	74.920
2008-07-01	67.092
2008-10-01	65.917
2009-01-01	66.567
2009-04-01	77.076
2009-07-01	84.746
2009-10-01	85.986
2010-01-01	91.677
2010-04-01	96.538
2010-07-01	103.327
2010-10-01	99.826
2011-01-01	104.629
2011-04-01	107.293
2011-07-01	106.528
2011-10-01	107.633
2012-01-01	118.036
2012-04-01	117.098
2012-07-01	118.966
2012-10-01	121.167
2013-01-01	120.893
2013-04-01	117.596
2013-07-01	126.421
2013-10-01	126.336
2014-01-01	132.909
2014-04-01	138.334
2014-07-01	132.968
2014-10-01	121.924
2015-01-01	121.894
2015-04-01	126.677
2015-07-01	115.325
2015-10-01	113.052
2016-01-01	124.204
2016-04-01	131.055
2016-07-01	136.525
2016-10-01	137.116
2017-01-01	146.802
2017-04-01	141.886
2017-07-01	150.634
2017-10-01	150.408
2018-01-01	164.115