Quarter	Billions of US Dollars
1989-10-01	179.166
1990-01-01	178.657
1990-04-01	189.182
1990-07-01	195.712
1990-10-01	195.048
1991-01-01	194.734
1991-04-01	200.108
1991-07-01	207.994
1991-10-01	198.936
1992-01-01	190.298
1992-04-01	199.653
1992-07-01	190.867
1992-10-01	179.973
1993-01-01	180.059
1993-04-01	189.303
1993-07-01	180.210
1993-10-01	183.816
1994-01-01	178.017
1994-04-01	181.961
1994-07-01	186.159
1994-10-01	172.738
1995-01-01	179.071
1995-04-01	188.326
1995-07-01	194.117
1995-10-01	184.765
1996-01-01	191.439
1996-04-01	189.523
1996-07-01	186.517
1996-10-01	172.450
1997-01-01	175.201
1997-04-01	172.583
1997-07-01	171.955
1997-10-01	167.207
1998-01-01	178.530
1998-04-01	171.828
1998-07-01	163.156
1998-10-01	161.550
1999-01-01	176.461
1999-04-01	173.442
1999-07-01	181.886
1999-10-01	188.965
2000-01-01	198.510
2000-04-01	190.253
2000-07-01	183.273
2000-10-01	184.228
2001-01-01	177.249
2001-04-01	177.744
2001-07-01	173.213
2001-10-01	176.253
2002-01-01	172.604
2002-04-01	187.057
2002-07-01	177.752
2002-10-01	176.275
2003-01-01	187.561
2003-04-01	204.116
2003-07-01	203.190
2003-10-01	213.081
2004-01-01	204.211
2004-04-01	207.511
2004-07-01	218.698
2004-10-01	234.939
2005-01-01	244.053
2005-04-01	240.058
2005-07-01	259.124
2005-10-01	268.809
2006-01-01	284.305
2006-04-01	299.168
2006-07-01	303.768
2006-10-01	306.579
2007-01-01	322.969
2007-04-01	338.251
2007-07-01	330.617
2007-10-01	323.606
2008-01-01	310.224
2008-04-01	308.578
2008-07-01	294.681
2008-10-01	286.085
2009-01-01	282.450
2009-04-01	299.529
2009-07-01	317.716
2009-10-01	306.510
2010-01-01	304.180
2010-04-01	285.044
2010-07-01	294.814
2010-10-01	303.353
2011-01-01	302.048
2011-04-01	310.838
2011-07-01	299.546
2011-10-01	291.431
2012-01-01	303.830
2012-04-01	307.820
2012-07-01	329.609
2012-10-01	320.405
2013-01-01	316.350
2013-04-01	324.189
2013-07-01	332.467
2013-10-01	300.008
2014-01-01	276.349
2014-04-01	296.828
2014-07-01	279.585
2014-10-01	263.919
2015-01-01	236.623