Quarter	Billions of US Dollars
1993-07-01	77.020
1993-10-01	2.466
1994-01-01	3.132
1994-04-01	2.011
1994-07-01	0.598
1994-10-01	-5.869
1995-01-01	2.927
1995-04-01	4.155
1995-07-01	6.820
1995-10-01	5.975
1996-01-01	4.351
1996-04-01	20.206
1996-07-01	-6.644
1996-10-01	6.974
1997-01-01	8.281
1997-04-01	6.025
1997-07-01	11.965
1997-10-01	6.030
1998-01-01	6.412
1998-04-01	-2.928
1998-07-01	19.050
1998-10-01	8.048
1999-01-01	30.414
1999-04-01	9.699
1999-07-01	38.030
1999-10-01	23.711
2000-01-01	27.786
2000-04-01	43.707
2000-07-01	28.185
2000-10-01	41.897
2001-01-01	9.347
2001-04-01	-26.383
2001-07-01	-32.424
2001-10-01	-6.217
2002-01-01	-4.169
2002-04-01	4.507
2002-07-01	15.472
2002-10-01	-10.490
2003-01-01	45.394
2003-04-01	3.113
2003-07-01	-28.050
2003-10-01	38.062
2004-01-01	31.664
2004-04-01	6.902
2004-07-01	23.803
2004-10-01	8.426
2005-01-01	32.272
2005-04-01	17.555
2005-07-01	11.024
2005-10-01	-16.753
2006-01-01	64.544
2006-04-01	31.764
2006-07-01	22.065
2006-10-01	26.476
2007-01-01	112.730
2007-04-01	82.304
2007-07-01	-3.826
2007-10-01	-26.001
2008-01-01	120.713
2008-04-01	51.811
2008-07-01	-35.605
2008-10-01	-100.417
2009-01-01	-26.288
2009-04-01	-67.241
2009-07-01	19.147
2009-10-01	-127.920
2010-01-01	51.627
2010-04-01	-50.425
2010-07-01	33.005
2010-10-01	-59.625
2011-01-01	27.365
2011-04-01	-14.079
2011-07-01	3.844
2011-10-01	-13.906
2012-01-01	96.700
2012-04-01	-32.417
2012-07-01	-46.549
2012-10-01	-32.529
2013-01-01	8.680
2013-04-01	-0.594
2013-07-01	12.542
2013-10-01	-42.423
2014-01-01	-15.073
2014-04-01	33.900
2014-07-01	24.774
2014-10-01	-15.781
2015-01-01	42.277
2015-04-01	-17.224