Quarter	Billions of US Dollars
1993-07-01	0.4870
1993-10-01	0.7738
1994-01-01	0.6333
1994-04-01	0.5948
1994-07-01	0.5989
1994-10-01	0.9485
1995-01-01	0.9516
1995-04-01	0.6032
1995-07-01	1.0178
1995-10-01	1.1770
1996-01-01	0.6743
1996-04-01	0.7029
1996-07-01	0.5784
1996-10-01	0.3900
1997-01-01	0.3846
1997-04-01	0.6096
1997-07-01	0.9038
1997-10-01	1.0847
1998-01-01	2.1514
1998-04-01	0.5526
1998-07-01	1.2502
1998-10-01	1.4113
1999-01-01	1.7156
1999-04-01	1.6197
1999-07-01	2.2610
1999-10-01	2.2055
2000-01-01	2.0737
2000-04-01	3.5238
2000-07-01	4.0511
2000-10-01	7.6330
2001-01-01	4.4447
2001-04-01	4.3069
2001-07-01	4.0048
2001-10-01	7.2528
2002-01-01	6.8426
2002-04-01	6.2175
2002-07-01	7.0540
2002-10-01	6.8503
2003-01-01	9.1638
2003-04-01	7.0176
2003-07-01	7.5207
2003-10-01	7.3608
2004-01-01	12.5543
2004-04-01	12.4295
2004-07-01	10.7999
2004-10-01	10.5974
2005-01-01	11.4092
2005-04-01	11.8999
2005-07-01	12.5963
2005-10-01	10.1311
2006-01-01	12.8653
2006-04-01	10.7611
2006-07-01	10.0563
2006-10-01	15.7398
2007-01-01	15.3862
2007-04-01	16.0354
2007-07-01	18.4687
2007-10-01	31.2950
2008-01-01	29.5695
2008-04-01	41.5802
2008-07-01	25.0253
2008-10-01	26.4505
2009-01-01	23.1888
2009-04-01	21.1851
2009-07-01	21.4360
2009-10-01	10.8928
2010-01-01	14.8556
2010-04-01	14.6757
2010-07-01	22.8692
2010-10-01	31.7274
2011-01-01	19.2190
2011-04-01	22.0258
2011-07-01	16.0841
2011-10-01	14.1478
2012-01-01	32.4187
2012-04-01	29.3721
2012-07-01	22.1932
2012-10-01	24.5422
2013-01-01	30.2202
2013-04-01	29.0493
2013-07-01	21.8912
2013-10-01	32.4242
2014-01-01	29.4010
2014-04-01	28.3854
2014-07-01	27.5917
2014-10-01	28.4637
2015-01-01	25.9275
2015-04-01	24.6074