Quarter	Billions of US Dollars
2002-01-01	28.323
2002-04-01	33.357
2002-07-01	33.956
2002-10-01	37.131
2003-01-01	42.786
2003-04-01	49.265
2003-07-01	54.721
2003-10-01	64.173
2004-01-01	61.493
2004-04-01	60.527
2004-07-01	61.161
2004-10-01	66.512
2005-01-01	63.347
2005-04-01	59.136
2005-07-01	58.958
2005-10-01	57.863
2006-01-01	61.990
2006-04-01	67.855
2006-07-01	70.330
2006-10-01	76.069
2007-01-01	93.177
2007-04-01	110.977
2007-07-01	133.839
2007-10-01	156.950
2008-01-01	168.469
2008-04-01	167.816
2008-07-01	152.169
2008-10-01	147.972
2009-01-01	146.890
2009-04-01	162.253
2009-07-01	174.431
2009-10-01	172.896
2010-01-01	161.192
2010-04-01	145.459
2010-07-01	160.719
2010-10-01	155.996
2011-01-01	167.568
2011-04-01	177.809
2011-07-01	168.993
2011-10-01	166.179
2012-01-01	178.986
2012-04-01	171.032
2012-07-01	179.228
2012-10-01	184.468
2013-01-01	181.599
2013-04-01	188.165
2013-07-01	198.814
2013-10-01	206.155
2014-01-01	212.664
2014-04-01	213.426
2014-07-01	202.711
2014-10-01	200.920
2015-01-01	187.276
2015-04-01	201.007
2015-07-01	206.385
2015-10-01	206.605
2016-01-01	216.177
2016-04-01	208.230
2016-07-01	208.603
2016-10-01	198.955
2017-01-01	205.066
2017-04-01	218.322
2017-07-01	227.182
2017-10-01	228.881
2018-01-01	226.730