Quarter	Billions of US Dollars
1997-10-01	3158.848
1998-01-01	3151.702
1998-04-01	3271.828
1998-07-01	3535.268
1998-10-01	3601.935
1999-01-01	4811.236
1999-04-01	4755.253
1999-07-01	5006.228
1999-10-01	4900.596
2000-01-01	4737.344
2000-04-01	4855.501
2000-07-01	4581.998
2000-10-01	5064.429
2001-01-01	4884.507
2001-04-01	4793.409
2001-07-01	5243.520
2001-10-01	5257.447
2002-01-01	5268.102
2002-04-01	6083.327
2002-07-01	6046.707
2002-10-01	6532.531
2003-01-01	6837.131
2003-04-01	7275.910
2003-07-01	7442.798
2003-10-01	8192.721
2004-01-01	8000.184
2004-04-01	8052.605
2004-07-01	8266.944
2004-10-01	9270.941
2005-01-01	8924.999
2005-04-01	8512.445
2005-07-01	8540.567
2005-10-01	8508.865
2006-01-01	9003.831
2006-04-01	9681.173
2006-07-01	9638.037
2006-10-01	10217.887
2007-01-01	10513.696
2007-04-01	11010.473
2007-07-01	11706.087
2007-10-01	12716.188
2008-01-01	13951.952
2008-04-01	14183.491
2008-07-01	13123.066
2008-10-01	12905.157
2009-01-01	12447.984
2009-04-01	13252.834
2009-07-01	13641.285
2009-10-01	13491.334
2010-01-01	12675.528
2010-04-01	11665.989
2010-07-01	12984.896
2010-10-01	12880.944
2011-01-01	13723.063
2011-04-01	14129.504
2011-07-01	13293.508
2011-10-01	13160.915
2012-01-01	13768.804
2012-04-01	13111.004
2012-07-01	13499.942
2012-10-01	13630.243
2013-01-01	13225.894
2013-04-01	13483.933
2013-07-01	13893.099
2013-10-01	14104.926
2014-01-01	14201.245
2014-04-01	14188.045
2014-07-01	13148.672
2014-10-01	12927.517
2015-01-01	12089.859
2015-04-01	12469.875
2015-07-01	12553.291
2015-10-01	12183.320
2016-01-01	12855.869
2016-04-01	12678.246
2016-07-01	12752.578
2016-10-01	12125.215
2017-01-01	12416.774
2017-04-01	13194.546
2017-07-01	13631.830
2017-10-01	13884.781
2018-01-01	14424.838