Quarter	Billions of US Dollars
1998-01-01	350.616
1998-04-01	368.029
1998-07-01	369.942
1998-10-01	419.580
1999-01-01	339.493
1999-04-01	327.638
1999-07-01	321.541
1999-10-01	343.324
2000-01-01	363.924
2000-04-01	387.502
2000-07-01	397.273
2000-10-01	382.376
2001-01-01	362.769
2001-04-01	356.013
2001-07-01	327.580
2001-10-01	381.505
2002-01-01	389.895
2002-04-01	354.114
2002-07-01	294.470
2002-10-01	320.026
2003-01-01	346.824
2003-04-01	406.650
2003-07-01	420.037
2003-10-01	422.825
2004-01-01	440.340
2004-04-01	415.823
2004-07-01	455.790
2004-10-01	501.089
2005-01-01	518.833
2005-04-01	593.677
2005-07-01	640.961
2005-10-01	624.434
2006-01-01	683.732
2006-04-01	669.864
2006-07-01	699.557
2006-10-01	728.431
2007-01-01	786.623
2007-04-01	861.049
2007-07-01	897.296
2007-10-01	973.922
2008-01-01	995.482
2008-04-01	1117.238
2008-07-01	912.810
2008-10-01	819.524
2009-01-01	821.224
2009-04-01	1002.493
2009-07-01	1145.206
2009-10-01	1237.087
2010-01-01	1222.998
2010-04-01	1284.510
2010-07-01	1374.397
2010-10-01	1461.740
2011-01-01	1493.644
2011-04-01	1624.365
2011-07-01	1380.715
2011-10-01	1421.187
2012-01-01	1479.506
2012-04-01	1397.899
2012-07-01	1386.360
2012-10-01	1447.738
2013-01-01	1451.901
2013-04-01	1344.393
2013-07-01	1331.029
2013-10-01	1345.131
2014-01-01	1394.587
2014-04-01	1505.313
2014-07-01	1347.232
2014-10-01	1342.317
2015-01-01	1150.665
2015-04-01	1250.555
2015-07-01	1037.256
2015-10-01	1085.937
2016-01-01	1212.054
2016-04-01	1386.466
2016-07-01	1415.270
2016-10-01	1491.457
2017-01-01	1598.075
2017-04-01	1571.053
2017-07-01	1659.959
2017-10-01	1644.936
2018-01-01	1682.974