Quarter	Billions of US Dollars
1999-10-01	198.668
2000-01-01	187.110
2000-04-01	186.927
2000-07-01	184.653
2000-10-01	174.843
2001-01-01	173.189
2001-04-01	169.662
2001-07-01	166.541
2001-10-01	160.121
2002-01-01	157.794
2002-04-01	156.688
2002-07-01	156.646
2002-10-01	156.408
2003-01-01	156.052
2003-04-01	158.022
2003-07-01	153.414
2003-10-01	157.073
2004-01-01	159.005
2004-04-01	153.979
2004-07-01	151.089
2004-10-01	156.987
2005-01-01	156.033
2005-04-01	151.666
2005-07-01	133.025
2005-10-01	123.635
2006-01-01	125.034
2006-04-01	126.391
2006-07-01	106.101
2006-10-01	111.371
2007-01-01	113.694
2007-04-01	114.886
2007-07-01	120.130
2007-10-01	121.250
2008-01-01	126.810
2008-04-01	126.376
2008-07-01	120.990
2008-10-01	114.611
2009-01-01	105.685
2009-04-01	113.044
2009-07-01	126.570
2009-10-01	142.174
2010-01-01	145.975
2010-04-01	147.677
2010-07-01	159.269
2010-10-01	177.549
2011-01-01	197.851
2011-04-01	210.885
2011-07-01	200.567
2011-10-01	208.514
2012-01-01	227.093
2012-04-01	216.401
2012-07-01	227.435
2012-10-01	265.539
2013-01-01	252.430
2013-04-01	248.042
2013-07-01	264.069
2013-10-01	291.332
2014-01-01	274.115
2014-04-01	283.183
2014-07-01	249.640
2014-10-01	213.179
2015-01-01	215.926
2015-04-01	221.111
2015-07-01	195.798
2015-10-01	183.703
2016-01-01	198.164
2016-04-01	206.278
2016-07-01	209.665
2016-10-01	226.677
2017-01-01	244.412
2017-04-01	238.156
2017-07-01	249.441
2017-10-01	246.163
2018-01-01	247.622