Quarter	Billions of US Dollars
1993-07-01	10.683
1993-10-01	5.580
1994-01-01	6.946
1994-04-01	-1.344
1994-07-01	-1.163
1994-10-01	-5.019
1995-01-01	-8.200
1995-04-01	-0.671
1995-07-01	-5.495
1995-10-01	5.712
1996-01-01	4.516
1996-04-01	6.601
1996-07-01	0.563
1996-10-01	11.046
1997-01-01	5.998
1997-04-01	12.696
1997-07-01	14.389
1997-10-01	-4.831
1998-01-01	4.979
1998-04-01	19.422
1998-07-01	4.440
1998-10-01	13.999
1999-01-01	20.628
1999-04-01	39.015
1999-07-01	31.769
1999-10-01	25.603
2000-01-01	12.857
2000-04-01	47.447
2000-07-01	45.040
2000-10-01	38.935
2001-01-01	54.656
2001-04-01	55.854
2001-07-01	12.218
2001-10-01	44.059
2002-01-01	3.681
2002-04-01	29.516
2002-07-01	-7.299
2002-10-01	0.173
2003-01-01	6.523
2003-04-01	25.910
2003-07-01	11.443
2003-10-01	30.164
2004-01-01	0.874
2004-04-01	9.482
2004-07-01	-1.171
2004-10-01	22.989
2005-01-01	7.388
2005-04-01	6.609
2005-07-01	-18.694
2005-10-01	29.613
2006-01-01	23.363
2006-04-01	23.955
2006-07-01	25.404
2006-10-01	36.000
2007-01-01	21.174
2007-04-01	71.728
2007-07-01	-0.067
2007-10-01	34.382
2008-01-01	5.335
2008-04-01	54.349
2008-07-01	21.479
2008-10-01	4.233
2009-01-01	45.452
2009-04-01	93.039
2009-07-01	45.715
2009-10-01	47.272
2010-01-01	45.392
2010-04-01	26.269
2010-07-01	36.649
2010-10-01	47.957
2011-01-01	44.679
2011-04-01	64.562
2011-07-01	21.220
2011-10-01	42.951
2012-01-01	72.619
2012-04-01	51.844
2012-07-01	83.587
2012-10-01	98.753
2013-01-01	78.067
2013-04-01	76.970
2013-07-01	77.656
2013-10-01	120.860
2014-01-01	32.879
2014-04-01	87.947
2014-07-01	80.755
2014-10-01	73.886
2015-01-01	74.417
2015-04-01	82.696