Quarter	Billions of US Dollars
1993-07-01	0.3128
1993-10-01	0.2957
1994-01-01	0.1944
1994-04-01	0.3210
1994-07-01	0.3717
1994-10-01	0.5068
1995-01-01	0.5531
1995-04-01	0.3218
1995-07-01	0.1945
1995-10-01	0.0870
1996-01-01	0.0950
1996-04-01	0.1179
1996-07-01	0.0977
1996-10-01	0.1296
1997-01-01	0.3569
1997-04-01	0.3809
1997-07-01	0.4135
1997-10-01	0.3818
1998-01-01	0.3074
1998-04-01	0.3206
1998-07-01	0.2478
1998-10-01	0.1970
1999-01-01	0.3973
1999-04-01	0.5120
1999-07-01	0.6851
1999-10-01	0.7201
2000-01-01	0.6210
2000-04-01	0.5982
2000-07-01	0.7785
2000-10-01	1.2572
2001-01-01	1.0144
2001-04-01	1.0102
2001-07-01	1.3841
2001-10-01	1.4406
2002-01-01	1.2631
2002-04-01	1.3878
2002-07-01	0.8397
2002-10-01	1.2719
2003-01-01	1.9267
2003-04-01	2.0194
2003-07-01	2.3471
2003-10-01	3.4389
2004-01-01	4.1349
2004-04-01	4.0274
2004-07-01	4.2416
2004-10-01	3.0770
2005-01-01	2.9434
2005-04-01	2.7808
2005-07-01	3.9138
2005-10-01	4.8277
2006-01-01	6.0667
2006-04-01	5.6311
2006-07-01	8.1860
2006-10-01	9.5458
2007-01-01	15.5053
2007-04-01	16.2695
2007-07-01	14.2640
2007-10-01	13.4493
2008-01-01	12.4853
2008-04-01	11.2503
2008-07-01	11.3617
2008-10-01	13.0497
2009-01-01	11.6292
2009-04-01	15.6421
2009-07-01	16.3572
2009-10-01	13.5216
2010-01-01	12.2526
2010-04-01	15.3566
2010-07-01	17.7787
2010-10-01	15.5589
2011-01-01	18.6647
2011-04-01	17.3325
2011-07-01	18.2179
2011-10-01	18.0436
2012-01-01	16.6646
2012-04-01	13.1235
2012-07-01	10.9025
2012-10-01	13.0899
2013-01-01	14.8710
2013-04-01	19.4556
2013-07-01	22.8866
2013-10-01	28.0869
2014-01-01	29.6706
2014-04-01	27.1003
2014-07-01	27.7164
2014-10-01	29.7182
2015-01-01	28.1328
2015-04-01	37.0171