Quarter	Billions of US Dollars
1993-07-01	41.893
1993-10-01	41.757
1994-01-01	46.447
1994-04-01	47.711
1994-07-01	49.030
1994-10-01	42.345
1995-01-01	45.030
1995-04-01	47.416
1995-07-01	50.412
1995-10-01	50.480
1996-01-01	57.262
1996-04-01	63.105
1996-07-01	60.824
1996-10-01	59.406
1997-01-01	65.098
1997-04-01	59.747
1997-07-01	67.014
1997-10-01	64.081
1998-01-01	67.655
1998-04-01	65.925
1998-07-01	75.893
1998-10-01	72.372
1999-01-01	96.709
1999-04-01	85.264
1999-07-01	101.138
1999-10-01	80.286
2000-01-01	108.342
2000-04-01	103.418
2000-07-01	120.538
2000-10-01	121.205
2001-01-01	154.619
2001-04-01	154.478
2001-07-01	139.307
2001-10-01	140.665
2002-01-01	146.897
2002-04-01	152.634
2002-07-01	180.988
2002-10-01	178.984
2003-01-01	224.505
2003-04-01	222.069
2003-07-01	215.795
2003-10-01	265.045
2004-01-01	279.104
2004-04-01	267.367
2004-07-01	309.423
2004-10-01	333.180
2005-01-01	358.927
2005-04-01	355.908
2005-07-01	355.273
2005-10-01	334.061
2006-01-01	391.128
2006-04-01	399.646
2006-07-01	439.510
2006-10-01	457.534
2007-01-01	557.221
2007-04-01	568.650
2007-07-01	499.519
2007-10-01	500.459
2008-01-01	569.205
2008-04-01	552.827
2008-07-01	527.863
2008-10-01	411.867
2009-01-01	397.232
2009-04-01	404.897
2009-07-01	436.712
2009-10-01	382.982
2010-01-01	410.565
2010-04-01	348.218
2010-07-01	372.164
2010-10-01	333.386
2011-01-01	380.052
2011-04-01	358.181
2011-07-01	389.788
2011-10-01	389.912
2012-01-01	428.504
2012-04-01	356.310
2012-07-01	319.293
2012-10-01	255.666
2013-01-01	314.945
2013-04-01	301.642
2013-07-01	306.416
2013-10-01	286.022
2014-01-01	332.213
2014-04-01	326.580
2014-07-01	311.188
2014-10-01	286.705
2015-01-01	281.500
2015-04-01	244.631