Quarter	Billions of US Dollars
1993-07-01	73.637
1993-10-01	1.395
1994-01-01	2.268
1994-04-01	1.558
1994-07-01	1.012
1994-10-01	-6.916
1995-01-01	2.506
1995-04-01	4.815
1995-07-01	6.629
1995-10-01	4.222
1996-01-01	2.174
1996-04-01	20.235
1996-07-01	-8.634
1996-10-01	6.237
1997-01-01	7.407
1997-04-01	7.044
1997-07-01	9.354
1997-10-01	2.184
1998-01-01	4.802
1998-04-01	-2.074
1998-07-01	17.754
1998-10-01	6.467
1999-01-01	29.899
1999-04-01	7.090
1999-07-01	34.109
1999-10-01	20.424
2000-01-01	23.184
2000-04-01	41.639
2000-07-01	28.554
2000-10-01	43.012
2001-01-01	5.246
2001-04-01	-18.837
2001-07-01	-32.855
2001-10-01	-5.869
2002-01-01	-2.533
2002-04-01	4.417
2002-07-01	14.320
2002-10-01	-8.222
2003-01-01	45.041
2003-04-01	9.475
2003-07-01	-26.435
2003-10-01	35.919
2004-01-01	32.862
2004-04-01	9.888
2004-07-01	26.396
2004-10-01	8.737
2005-01-01	21.460
2005-04-01	21.353
2005-07-01	2.737
2005-10-01	-11.852
2006-01-01	58.941
2006-04-01	30.428
2006-07-01	21.691
2006-10-01	24.066
2007-01-01	109.148
2007-04-01	74.332
2007-07-01	7.087
2007-10-01	-20.636
2008-01-01	138.376
2008-04-01	60.301
2008-07-01	-28.913
2008-10-01	-92.395
2009-01-01	-30.102
2009-04-01	-69.388
2009-07-01	20.267
2009-10-01	-126.200
2010-01-01	50.021
2010-04-01	-47.326
2010-07-01	31.249
2010-10-01	-60.381
2011-01-01	23.070
2011-04-01	-14.465
2011-07-01	5.512
2011-10-01	-10.747
2012-01-01	106.408
2012-04-01	-32.198
2012-07-01	-46.470
2012-10-01	-17.065
2013-01-01	9.989
2013-04-01	-2.698
2013-07-01	17.545
2013-10-01	-41.429
2014-01-01	-1.263
2014-04-01	39.535
2014-07-01	26.176
2014-10-01	-15.761
2015-01-01	39.819
2015-04-01	-17.274