Quarter	Billions of US Dollars
1999-10-01	15944.554
2000-01-01	15923.797
2000-04-01	16007.381
2000-07-01	15825.547
2000-10-01	16101.955
2001-01-01	15604.004
2001-04-01	15771.083
2001-07-01	16541.727
2001-10-01	16331.977
2002-01-01	16453.367
2002-04-01	17756.403
2002-07-01	17949.047
2002-10-01	18744.225
2003-01-01	19209.179
2003-04-01	20082.805
2003-07-01	20927.767
2003-10-01	22155.671
2004-01-01	22437.321
2004-04-01	22711.375
2004-07-01	23331.568
2004-10-01	25033.094
2005-01-01	24663.187
2005-04-01	24548.545
2005-07-01	25034.891
2005-10-01	25240.894
2006-01-01	25940.018
2006-04-01	27180.837
2006-07-01	27696.329
2006-10-01	28646.960
2007-01-01	29174.701
2007-04-01	30026.180
2007-07-01	31308.604
2007-10-01	32222.399
2008-01-01	33579.251
2008-04-01	33654.539
2008-07-01	32432.228
2008-10-01	31529.695
2009-01-01	30727.877
2009-04-01	32085.994
2009-07-01	32910.427
2009-10-01	32816.817
2010-01-01	31997.728
2010-04-01	31246.645
2010-07-01	32892.320
2010-10-01	33044.560
2011-01-01	33723.611
2011-04-01	34170.967
2011-07-01	33250.263
2011-10-01	32968.022
2012-01-01	33185.366
2012-04-01	32653.603
2012-07-01	33293.194
2012-10-01	33222.483
2013-01-01	32414.340
2013-04-01	32284.164
2013-07-01	33001.005
2013-10-01	33078.835
2014-01-01	33138.358
2014-04-01	33466.236
2014-07-01	32280.669
2014-10-01	31604.440
2015-01-01	30305.636
2015-04-01	31055.182
2015-07-01	30889.565
2015-10-01	30725.774
2016-01-01	31495.690
2016-04-01	31634.295
2016-07-01	31999.459
2016-10-01	31138.710
2017-01-01	31674.617
2017-04-01	32711.040
2017-07-01	33421.149
2017-10-01	33876.810
2018-01-01	34453.987