Quarter	Billions of US Dollars
1999-10-01	166.587
2000-01-01	166.004
2000-04-01	165.435
2000-07-01	164.861
2000-10-01	164.288
2001-01-01	166.101
2001-04-01	167.905
2001-07-01	169.686
2001-10-01	171.509
2002-01-01	174.313
2002-04-01	177.104
2002-07-01	179.894
2002-10-01	182.698
2003-01-01	181.046
2003-04-01	179.365
2003-07-01	177.708
2003-10-01	176.046
2004-01-01	172.749
2004-04-01	169.433
2004-07-01	166.127
2004-10-01	162.820
2005-01-01	152.753
2005-04-01	142.693
2005-07-01	132.534
2005-10-01	122.563
2006-01-01	116.216
2006-04-01	109.903
2006-07-01	103.556
2006-10-01	97.222
2007-01-01	90.701
2007-04-01	84.169
2007-07-01	77.835
2007-10-01	71.125
2008-01-01	68.992
2008-04-01	66.910
2008-07-01	64.660
2008-10-01	62.624
2009-01-01	62.009
2009-04-01	61.348
2009-07-01	60.686
2009-10-01	60.015
2010-01-01	56.150
2010-04-01	52.274
2010-07-01	48.401
2010-10-01	44.531
2011-01-01	42.431
2011-04-01	40.331
2011-07-01	38.229
2011-10-01	36.131
2012-01-01	32.687
2012-04-01	29.244
2012-07-01	25.802
2012-10-01	22.356
2013-01-01	20.776
2013-04-01	19.194
2013-07-01	17.613
2013-10-01	16.029
2014-01-01	14.973
2014-04-01	13.914
2014-07-01	12.855
2014-10-01	11.789
2015-01-01	18.331
2015-04-01	24.866
2015-07-01	31.398
2015-10-01	37.879
2016-01-01	49.553
2016-04-01	61.175
2016-07-01	72.707
2016-10-01	84.388
2017-01-01	92.509
2017-04-01	100.611
2017-07-01	108.705
2017-10-01	116.800
2018-01-01	124.506