Quarter	Billions of US Dollars
1999-10-01	235.208
2000-01-01	245.892
2000-04-01	246.858
2000-07-01	252.305
2000-10-01	254.219
2001-01-01	249.929
2001-04-01	256.196
2001-07-01	252.834
2001-10-01	255.504
2002-01-01	246.744
2002-04-01	250.992
2002-07-01	249.236
2002-10-01	257.426
2003-01-01	260.767
2003-04-01	279.785
2003-07-01	276.495
2003-10-01	282.770
2004-01-01	278.656
2004-04-01	281.540
2004-07-01	285.355
2004-10-01	297.947
2005-01-01	297.956
2005-04-01	294.169
2005-07-01	300.274
2005-10-01	300.350
2006-01-01	302.054
2006-04-01	312.613
2006-07-01	323.586
2006-10-01	337.880
2007-01-01	349.281
2007-04-01	349.712
2007-07-01	369.740
2007-10-01	393.385
2008-01-01	423.902
2008-04-01	458.017
2008-07-01	445.295
2008-10-01	404.831
2009-01-01	380.841
2009-04-01	411.705
2009-07-01	436.529
2009-10-01	438.170
2010-01-01	448.238
2010-04-01	436.625
2010-07-01	473.246
2010-10-01	490.929
2011-01-01	502.360
2011-04-01	510.879
2011-07-01	477.958
2011-10-01	474.476
2012-01-01	494.850
2012-04-01	472.131
2012-07-01	480.374
2012-10-01	511.399
2013-01-01	524.054
2013-04-01	533.474
2013-07-01	551.714
2013-10-01	566.372
2014-01-01	567.420
2014-04-01	582.870
2014-07-01	552.409
2014-10-01	524.292
2015-01-01	521.701
2015-04-01	541.859
2015-07-01	527.706
2015-10-01	539.820
2016-01-01	563.004
2016-04-01	562.691
2016-07-01	579.764
2016-10-01	569.633
2017-01-01	602.722
2017-04-01	634.788
2017-07-01	640.492
2017-10-01	648.110
2018-01-01	654.626