Quarter	Billions of US Dollars
2003-01-01	17.615
2003-04-01	19.266
2003-07-01	19.501
2003-10-01	21.447
2004-01-01	20.975
2004-04-01	21.363
2004-07-01	21.895
2004-10-01	24.459
2005-01-01	23.744
2005-04-01	23.728
2005-07-01	23.329
2005-10-01	23.528
2006-01-01	24.885
2006-04-01	26.537
2006-07-01	27.767
2006-10-01	30.391
2007-01-01	33.862
2007-04-01	35.800
2007-07-01	37.622
2007-10-01	42.771
2008-01-01	46.869
2008-04-01	49.247
2008-07-01	48.144
2008-10-01	50.568
2009-01-01	47.885
2009-04-01	50.989
2009-07-01	52.381
2009-10-01	50.775
2010-01-01	49.008
2010-04-01	40.861
2010-07-01	45.046
2010-10-01	46.927
2011-01-01	48.058
2011-04-01	51.739
2011-07-01	47.432
2011-10-01	46.521
2012-01-01	47.697
2012-04-01	45.915
2012-07-01	48.079
2012-10-01	48.929
2013-01-01	48.851
2013-04-01	50.069
2013-07-01	52.569
2013-10-01	56.071
2014-01-01	56.386
2014-04-01	54.846
2014-07-01	51.479
2014-10-01	54.598
2015-01-01	46.208
2015-04-01	53.016
2015-07-01	54.351
2015-10-01	52.115
2016-01-01	55.170
2016-04-01	55.730
2016-07-01	57.680
2016-10-01	54.850
2017-01-01	57.063
2017-04-01	63.196
2017-07-01	66.267
2017-10-01	68.243
2018-01-01	71.526