Quarter	Billions of US Dollars
1989-07-01	0.03090
1989-10-01	0.03233
1990-01-01	0.03341
1990-04-01	0.03527
1990-07-01	0.03849
1990-10-01	0.03860
1991-01-01	0.03425
1991-04-01	0.03205
1991-07-01	0.03449
1991-10-01	0.03689
1992-01-01	0.03337
1992-04-01	0.03630
1992-07-01	0.04067
1992-10-01	0.03434
1993-01-01	0.03344
1993-04-01	0.03312
1993-07-01	0.03527
1993-10-01	0.03380
1994-01-01	0.03546
1994-04-01	0.03719
1994-07-01	0.03888
1996-01-01	0.08402
1996-04-01	0.15733
1996-07-01	0.15767
1996-10-01	0.15917
1997-01-01	0.15637
1997-04-01	0.16274
1997-07-01	0.16056
1997-10-01	0.16243
1998-01-01	0.15477
1998-04-01	0.14878
1998-07-01	0.15686
1998-10-01	0.15582
1999-01-01	0.14782
1999-04-01	0.23978
1999-07-01	0.24927
1999-10-01	0.33088
2000-01-01	0.31945
2000-04-01	0.32157
2000-07-01	0.30393
2000-10-01	0.47180
2001-01-01	0.44663
2001-04-01	0.43224
2001-07-01	0.63193
2001-10-01	0.60910
2002-01-01	0.77697
2002-04-01	0.89866
2002-07-01	0.89848
2002-10-01	0.98669
2003-01-01	0.94812
2003-04-01	0.96284
2003-07-01	1.14117
2003-10-01	1.21030
2004-01-01	1.27147
2004-04-01	1.28767
2004-07-01	1.28370
2004-10-01	1.55325
2005-01-01	1.48006
2005-04-01	1.57811
2005-07-01	1.57377
2005-10-01	1.35651
2006-01-01	1.56060
2006-04-01	1.44469
2006-07-01	1.42715
2006-10-01	1.37260
2007-01-01	1.37505
2007-04-01	1.37292
2007-07-01	1.43889
2007-10-01	1.30795
2008-01-01	1.46667
2008-04-01	1.47676
2008-07-01	1.17704
2008-10-01	1.20860
2009-01-01	1.02494
2009-04-01	1.06203
2009-07-01	1.07826
2009-10-01	1.46487
2010-01-01	1.42409
2010-04-01	1.39661
2010-07-01	1.54162
2010-10-01	1.59642
2011-01-01	1.42108
2011-04-01	1.79770
2011-07-01	1.66408
2011-10-01	1.59422
2012-01-01	1.66095
2012-04-01	1.30835
2012-07-01	1.33618
2012-10-01	1.36374
2013-01-01	1.31289
2013-04-01	1.32809
2013-07-01	1.10473
2013-10-01	1.12170
2014-01-01	0.84842
2014-04-01	0.84241
2014-07-01	0.78280
2014-10-01	0.75827
2015-01-01	0.77097
2015-04-01	0.80593