Quarter	Billions of US Dollars
1990-10-01	172.613
1991-01-01	156.036
1991-04-01	147.165
1991-07-01	161.466
1991-10-01	182.088
1992-01-01	172.614
1992-04-01	187.776
1992-07-01	208.222
1992-10-01	184.320
1993-01-01	189.787
1993-04-01	182.611
1993-07-01	191.193
1993-10-01	186.527
1994-01-01	201.317
1994-04-01	216.561
1994-07-01	226.620
1994-10-01	232.805
1995-01-01	268.935
1995-04-01	278.385
1995-07-01	273.979
1995-10-01	277.642
1996-01-01	280.015
1996-04-01	280.118
1996-07-01	285.963
1996-10-01	289.714
1997-01-01	288.002
1997-04-01	292.923
1997-07-01	301.891
1997-10-01	290.408
1998-01-01	299.321
1998-04-01	313.997
1998-07-01	352.420
1998-10-01	360.331
1999-01-01	344.961
1999-04-01	343.069
1999-07-01	366.895
1999-10-01	356.256
2000-01-01	346.153
2000-04-01	356.941
2000-07-01	338.556
2000-10-01	367.956
2001-01-01	355.544
2001-04-01	349.173
2001-07-01	384.078
2001-10-01	378.771
2002-01-01	381.247
2002-04-01	446.823
2002-07-01	453.163
2002-10-01	493.054
2003-01-01	522.628
2003-04-01	561.249
2003-07-01	589.893
2003-10-01	653.563
2004-01-01	641.818
2004-04-01	649.206
2004-07-01	675.722
2004-10-01	751.062
2005-01-01	726.394
2005-04-01	688.503
2005-07-01	701.585
2005-10-01	700.718
2006-01-01	729.185
2006-04-01	782.582
2006-07-01	792.597
2006-10-01	842.739
2007-01-01	869.479
2007-04-01	894.516
2007-07-01	955.260
2007-10-01	999.558
2008-01-01	1083.457
2008-04-01	1096.045
2008-07-01	1007.755
2008-10-01	995.115
2009-01-01	959.178
2009-04-01	1028.461
2009-07-01	1074.504
2009-10-01	1065.928
2010-01-01	1001.857
2010-04-01	921.635
2010-07-01	1034.021
2010-10-01	1017.520
2011-01-01	1083.340
2011-04-01	1107.393
2011-07-01	1039.634
2011-10-01	998.270
2012-01-01	1027.558
2012-04-01	971.473
2012-07-01	1001.382
2012-10-01	1021.615
2013-01-01	986.015
2013-04-01	1003.092
2013-07-01	1034.651
2013-10-01	1047.178
2014-01-01	1044.251
2014-04-01	1033.133
2014-07-01	951.379
2014-10-01	916.875
2015-01-01	813.579
2015-04-01	847.170
2015-07-01	852.157
2015-10-01	830.527
2016-01-01	869.762
2016-04-01	852.143
2016-07-01	860.892
2016-10-01	810.981
2017-01-01	823.892
2017-04-01	882.002
2017-07-01	915.149
2017-10-01	932.820
2018-01-01	959.142