Quarter	Billions of US Dollars
1993-07-01	6.6577
1993-10-01	7.1602
1994-01-01	8.2010
1994-04-01	8.1675
1994-07-01	8.5407
1994-10-01	9.3378
1995-01-01	6.7815
1995-04-01	5.4864
1995-07-01	6.7080
1995-10-01	7.2533
1996-01-01	7.4215
1996-04-01	8.4467
1996-07-01	7.4859
1996-10-01	8.8875
1997-01-01	8.3842
1997-04-01	8.3371
1997-07-01	9.5578
1997-10-01	7.5060
1998-01-01	10.5751
1998-04-01	10.1761
1998-07-01	7.7858
1998-10-01	6.5654
1999-01-01	4.3606
1999-04-01	5.2689
1999-07-01	7.4956
1999-10-01	7.4086
2000-01-01	7.6035
2000-04-01	9.4619
2000-07-01	6.6412
2000-10-01	5.6001
2001-01-01	5.9248
2001-04-01	4.8109
2001-07-01	4.8075
2001-10-01	5.6448
2002-01-01	4.3089
2002-04-01	3.8383
2002-07-01	3.4474
2002-10-01	4.4954
2003-01-01	7.8950
2003-04-01	8.2061
2003-07-01	9.0110
2003-10-01	7.0724
2004-01-01	5.1456
2004-04-01	5.3171
2004-07-01	5.4907
2004-10-01	5.7749
2005-01-01	5.2946
2005-04-01	5.9545
2005-07-01	4.8623
2005-10-01	3.9331
2006-01-01	4.2464
2006-04-01	2.8630
2006-07-01	3.0173
2006-10-01	2.9793
2007-01-01	2.3274
2007-04-01	4.5491
2007-07-01	3.8642
2007-10-01	5.6262
2008-01-01	7.4672
2008-04-01	6.9909
2008-07-01	7.8522
2008-10-01	6.7384
2009-01-01	6.2334
2009-04-01	6.8893
2009-07-01	6.0560
2009-10-01	5.2136
2010-01-01	4.5927
2010-04-01	2.8017
2010-07-01	3.7085
2010-10-01	3.8941
2011-01-01	4.0416
2011-04-01	5.3755
2011-07-01	3.9528
2011-10-01	4.5890
2012-01-01	6.3737
2012-04-01	4.8486
2012-07-01	5.7596
2012-10-01	11.3150
2013-01-01	12.9221
2013-04-01	15.2112
2013-07-01	14.6627
2013-10-01	11.5688
2014-01-01	11.0567
2014-04-01	9.4849
2014-07-01	10.0827
2014-10-01	8.5966
2015-01-01	11.7038
2015-04-01	13.0183