Quarter	Billions of US Dollars
2001-10-01	164.902
2002-01-01	172.642
2002-04-01	192.200
2002-07-01	187.381
2002-10-01	189.350
2003-01-01	191.557
2003-04-01	205.661
2003-07-01	205.215
2003-10-01	208.039
2004-01-01	206.115
2004-04-01	197.690
2004-07-01	206.816
2004-10-01	210.471
2005-01-01	210.713
2005-04-01	210.167
2005-07-01	204.677
2005-10-01	214.780
2006-01-01	229.956
2006-04-01	229.511
2006-07-01	233.509
2006-10-01	244.500
2007-01-01	244.471
2007-04-01	249.686
2007-07-01	256.317
2007-10-01	264.781
2008-01-01	281.472
2008-04-01	299.687
2008-07-01	310.789
2008-10-01	280.495
2009-01-01	261.763
2009-04-01	298.699
2009-07-01	317.760
2009-10-01	331.994
2010-01-01	340.061
2010-04-01	359.640
2010-07-01	377.103
2010-10-01	393.237
2011-01-01	410.689
2011-04-01	436.905
2011-07-01	442.374
2011-10-01	459.966
2012-01-01	475.042
2012-04-01	490.507
2012-07-01	499.285
2012-10-01	513.945
2013-01-01	516.571
2013-04-01	531.826
2013-07-01	502.052
2013-10-01	499.266
2014-01-01	537.135
2014-04-01	537.138
2014-07-01	543.684
2014-10-01	546.638
2015-01-01	537.076
2015-04-01	545.197
2015-07-01	522.882
2015-10-01	568.486
2016-01-01	596.729
2016-04-01	618.449
2016-07-01	635.253
2016-10-01	635.048
2017-01-01	649.816
2017-04-01	663.983
2017-07-01	671.486
2017-10-01	687.753
2018-01-01	689.241