Quarter	Billions of US Dollars
1993-10-01	188.270
1994-01-01	226.722
1994-04-01	246.709
1994-07-01	337.967
1994-10-01	375.044
1995-01-01	388.430
1995-04-01	394.995
1995-07-01	387.104
1995-10-01	395.341
1996-01-01	410.309
1996-04-01	411.975
1996-07-01	399.108
1996-10-01	389.334
1997-01-01	388.391
1997-04-01	408.814
1997-07-01	421.089
1997-10-01	429.562
1998-01-01	442.133
1998-04-01	444.032
1998-07-01	440.095
1998-10-01	431.888
1999-01-01	310.327
1999-04-01	297.684
1999-07-01	284.054
1999-10-01	308.393
2000-01-01	295.740
2000-04-01	302.896
2000-07-01	302.801
2000-10-01	306.769
2001-01-01	297.324
2001-04-01	275.879
2001-07-01	259.792
2001-10-01	295.013
2002-01-01	303.980
2002-04-01	261.491
2002-07-01	213.683
2002-10-01	234.573
2003-01-01	250.867
2003-04-01	288.448
2003-07-01	290.377
2003-10-01	302.076
2004-01-01	299.122
2004-04-01	290.850
2004-07-01	322.337
2004-10-01	350.420
2005-01-01	361.491
2005-04-01	419.295
2005-07-01	458.064
2005-10-01	457.729
2006-01-01	503.406
2006-04-01	523.498
2006-07-01	554.468
2006-10-01	595.475
2007-01-01	620.714
2007-04-01	663.935
2007-07-01	716.673
2007-10-01	778.731
2008-01-01	837.368
2008-04-01	985.523
2008-07-01	882.956
2008-10-01	782.321
2009-01-01	786.454
2009-04-01	958.198
2009-07-01	1085.678
2009-10-01	1169.474
2010-01-01	1171.719
2010-04-01	1209.934
2010-07-01	1375.961
2010-10-01	1497.757
2011-01-01	1569.932
2011-04-01	1683.537
2011-07-01	1461.755
2011-10-01	1523.168
2012-01-01	1603.805
2012-04-01	1488.163
2012-07-01	1546.969
2012-10-01	1601.469
2013-01-01	1688.658
2013-04-01	1601.863
2013-07-01	1633.906
2013-10-01	1632.278
2014-01-01	1718.179
2014-04-01	1816.253
2014-07-01	1664.469
2014-10-01	1558.393
2015-01-01	1303.736
2015-04-01	1403.969
2015-07-01	1122.172
2015-10-01	1162.306
2016-01-01	1255.136
2016-04-01	1398.667
2016-07-01	1373.932
2016-10-01	1376.382
2017-01-01	1410.145
2017-04-01	1334.552
2017-07-01	1420.720
2017-10-01	1358.486
2018-01-01	1360.713