Quarter	Billions of US Dollars
1999-10-01	242.549
2000-01-01	238.778
2000-04-01	239.448
2000-07-01	225.938
2000-10-01	241.307
2001-01-01	232.439
2001-04-01	225.103
2001-07-01	246.619
2001-10-01	233.567
2002-01-01	233.022
2002-04-01	265.680
2002-07-01	262.182
2002-10-01	281.580
2003-01-01	288.763
2003-04-01	291.343
2003-07-01	299.262
2003-10-01	324.509
2004-01-01	314.510
2004-04-01	318.540
2004-07-01	317.544
2004-10-01	345.305
2005-01-01	333.671
2005-04-01	313.318
2005-07-01	313.741
2005-10-01	305.692
2006-01-01	312.761
2006-04-01	331.738
2006-07-01	338.047
2006-10-01	346.312
2007-01-01	365.921
2007-04-01	382.485
2007-07-01	418.157
2007-10-01	462.644
2008-01-01	526.414
2008-04-01	521.585
2008-07-01	490.885
2008-10-01	506.215
2009-01-01	486.328
2009-04-01	525.901
2009-07-01	561.767
2009-10-01	573.402
2010-01-01	565.917
2010-04-01	547.113
2010-07-01	611.609
2010-10-01	644.299
2011-01-01	668.467
2011-04-01	750.271
2011-07-01	704.766
2011-10-01	683.476
2012-01-01	722.495
2012-04-01	688.995
2012-07-01	712.340
2012-10-01	744.087
2013-01-01	710.547
2013-04-01	710.527
2013-07-01	735.226
2013-10-01	752.183
2014-01-01	756.510
2014-04-01	754.423
2014-07-01	698.530
2014-10-01	672.469
2015-01-01	690.516
2015-04-01	725.125
2015-07-01	707.741
2015-10-01	679.124
2016-01-01	725.033
2016-04-01	729.876
2016-07-01	746.729
2016-10-01	720.743
2017-01-01	737.813
2017-04-01	774.883
2017-07-01	770.005
2017-10-01	771.856
2018-01-01	796.341