Quarter	Billions of US Dollars
1993-07-01	0.0312
1993-10-01	0.0015
1994-01-01	0.0170
1994-04-01	0.0350
1994-07-01	0.0195
1994-10-01	0.0020
1995-01-01	0.0030
1995-04-01	0.0180
1995-07-01	0.0030
1995-10-01	0.6751
1996-01-01	0.0050
1996-04-01	0.2936
1996-07-01	0.1736
1996-10-01	0.1790
1997-01-01	0.5250
1997-04-01	0.4993
1997-07-01	0.4599
1997-10-01	0.3321
1998-01-01	0.4062
1998-04-01	0.1721
1998-07-01	0.1630
1998-10-01	0.0298
1999-01-01	0.5260
1999-04-01	0.1927
1999-07-01	0.2579
1999-10-01	1.3954
2000-01-01	0.7448
2000-04-01	1.0899
2000-07-01	1.1560
2000-10-01	1.7635
2001-01-01	1.6412
2001-04-01	1.9589
2001-07-01	2.8763
2001-10-01	2.6370
2002-01-01	3.8825
2002-04-01	3.5089
2002-07-01	3.9348
2002-10-01	4.1099
2003-01-01	4.7637
2003-04-01	8.0873
2003-07-01	8.2031
2003-10-01	6.0106
2004-01-01	7.0743
2004-04-01	6.5430
2004-07-01	6.0002
2004-10-01	6.4799
2005-01-01	7.6964
2005-04-01	5.9621
2005-07-01	7.0754
2005-10-01	6.2797
2006-01-01	6.4888
2006-04-01	8.7274
2006-07-01	11.2558
2006-10-01	12.1060
2007-01-01	11.1457
2007-04-01	12.1403
2007-07-01	11.9207
2007-10-01	14.0067
2008-01-01	18.9627
2008-04-01	24.1230
2008-07-01	21.2385
2008-10-01	14.9691
2009-01-01	18.8462
2009-04-01	22.6030
2009-07-01	24.0885
2009-10-01	22.3454
2010-01-01	23.8272
2010-04-01	10.0308
2010-07-01	12.0262
2010-10-01	7.6081
2011-01-01	8.4060
2011-04-01	7.2445
2011-07-01	6.3488
2011-10-01	7.0128
2012-01-01	4.9727
2012-04-01	5.0592
2012-07-01	5.0712
2012-10-01	7.7983
2013-01-01	6.5209
2013-04-01	3.4684
2013-07-01	4.8269
2013-10-01	2.3308
2014-01-01	2.1384
2014-04-01	1.9124
2014-07-01	0.6759
2014-10-01	0.3083
2015-01-01	0.2844
2015-04-01	0.3140