Quarter	Billions of US Dollars
1999-01-01	17439.481
1999-04-01	17087.911
1999-07-01	17968.209
1999-10-01	17897.846
2000-01-01	17785.608
2000-04-01	17609.081
2000-07-01	16966.694
2000-10-01	17216.912
2001-01-01	16807.619
2001-04-01	16562.857
2001-07-01	17338.733
2001-10-01	16734.388
2002-01-01	16675.138
2002-04-01	18486.233
2002-07-01	18736.100
2002-10-01	19432.667
2003-01-01	20124.680
2003-04-01	20955.367
2003-07-01	21572.037
2003-10-01	22625.211
2004-01-01	24181.219
2004-04-01	23849.748
2004-07-01	24240.998
2004-10-01	25956.684
2005-01-01	25598.027
2005-04-01	25219.751
2005-07-01	24901.388
2005-10-01	24557.188
2006-01-01	24721.356
2006-04-01	25213.232
2006-07-01	25401.891
2006-10-01	25712.187
2007-01-01	26068.881
2007-04-01	25736.464
2007-07-01	27093.984
2007-10-01	28013.329
2008-01-01	30314.643
2008-04-01	29529.619
2008-07-01	29182.852
2008-10-01	31661.491
2009-01-01	31393.972
2009-04-01	33209.342
2009-07-01	35332.567
2009-10-01	35411.646
2010-01-01	35607.624
2010-04-01	36376.438
2010-07-01	39386.299
2010-10-01	39818.806
2011-01-01	40748.317
2011-04-01	42131.882
2011-07-01	43336.449
2011-10-01	43574.957
2012-01-01	44220.418
2012-04-01	44885.402
2012-07-01	46370.179
2012-10-01	46086.102
2013-01-01	45210.870
2013-04-01	44379.061
2013-07-01	45151.277
2013-10-01	45246.103
2014-01-01	46428.016
2014-04-01	47317.986
2014-07-01	45613.359
2014-10-01	45310.769
2015-01-01	44239.219
2015-04-01	43867.627
2015-07-01	44201.442
2015-10-01	44345.304
2016-01-01	47026.545
2016-04-01	48437.067
2016-07-01	48681.254
2016-10-01	45426.283
2017-01-01	46025.458
2017-04-01	47107.388
2017-07-01	48013.430
2017-10-01	48519.853
2018-01-01	49977.205