Quarter	Billions of US Dollars
1993-07-01	1.004
1993-10-01	0.433
1994-01-01	1.366
1994-04-01	1.665
1994-07-01	5.210
1994-10-01	1.846
1995-01-01	4.452
1995-04-01	0.668
1995-07-01	3.466
1995-10-01	2.311
1996-01-01	4.167
1996-04-01	6.723
1996-07-01	7.049
1996-10-01	4.852
1997-01-01	6.345
1997-04-01	9.263
1997-07-01	7.250
1997-10-01	8.364
1998-01-01	6.332
1998-04-01	14.940
1998-07-01	8.257
1998-10-01	7.202
1999-01-01	29.507
1999-04-01	48.418
1999-07-01	34.368
1999-10-01	39.266
2000-01-01	28.745
2000-04-01	40.842
2000-07-01	32.991
2000-10-01	35.978
2001-01-01	44.982
2001-04-01	44.505
2001-07-01	34.558
2001-10-01	67.537
2002-01-01	32.603
2002-04-01	28.589
2002-07-01	22.201
2002-10-01	38.695
2003-01-01	46.102
2003-04-01	50.795
2003-07-01	40.904
2003-10-01	91.695
2004-01-01	65.315
2004-04-01	74.551
2004-07-01	96.102
2004-10-01	113.527
2005-01-01	68.204
2005-04-01	159.894
2005-07-01	14.197
2005-10-01	150.077
2006-01-01	117.409
2006-04-01	126.409
2006-07-01	146.301
2006-10-01	220.673
2007-01-01	212.117
2007-04-01	238.917
2007-07-01	11.508
2007-10-01	56.694
2008-01-01	36.608
2008-04-01	141.488
2008-07-01	35.611
2008-10-01	208.105
2009-01-01	0.888
2009-04-01	35.247
2009-07-01	14.631
2009-10-01	-15.646
2010-01-01	5.766
2010-04-01	-40.189
2010-07-01	35.332
2010-10-01	-27.622
2011-01-01	-32.672
2011-04-01	0.334
2011-07-01	-24.195
2011-10-01	18.808
2012-01-01	-53.794
2012-04-01	-86.794
2012-07-01	-104.150
2012-10-01	-49.940
2013-01-01	-78.903
2013-04-01	-47.389
2013-07-01	-27.528
2013-10-01	-27.294
2014-01-01	-49.556
2014-04-01	-11.767
2014-07-01	-20.729
2014-10-01	10.945
2015-01-01	-10.097
2015-04-01	-4.045