Quarter	Billions of US Dollars
1996-10-01	1.0000
1997-01-01	2.1920
1997-04-01	4.9467
1997-07-01	4.9328
1997-10-01	5.4160
1998-01-01	6.0698
1998-04-01	10.8800
1998-07-01	17.5278
1998-10-01	17.4328
1999-01-01	17.1932
1999-04-01	17.0893
1999-07-01	17.1734
1999-10-01	16.7986
2000-01-01	16.6748
2000-04-01	16.3949
2000-07-01	37.0651
2000-10-01	37.2007
2001-01-01	37.0819
2001-04-01	36.6016
2001-07-01	36.7350
2001-10-01	36.3308
2002-01-01	36.3059
2002-04-01	36.3560
2002-07-01	36.3238
2002-10-01	36.3993
2003-01-01	36.5035
2003-04-01	34.9598
2003-07-01	35.0141
2003-10-01	35.2500
2004-01-01	33.9020
2004-04-01	34.1603
2004-07-01	34.1956
2004-10-01	34.3967
2005-01-01	33.4753
2005-04-01	33.4078
2005-07-01	30.1673
2005-10-01	30.1484
2006-01-01	29.8886
2006-04-01	29.4272
2006-07-01	29.1417
2006-10-01	31.6904
2007-01-01	31.3168
2007-04-01	28.9314
2007-07-01	28.5990
2007-10-01	28.6413
2008-01-01	28.3414
2008-04-01	28.3376
2008-07-01	27.8384
2008-10-01	27.8083
2009-01-01	27.0710
2009-04-01	27.1355
2009-07-01	26.4855
2009-10-01	26.4670
2010-01-01	25.7047
2010-04-01	31.1103
2010-07-01	30.7101
2010-10-01	30.6878
2011-01-01	31.5515
2011-04-01	33.3693
2011-07-01	32.3037
2011-10-01	31.7476
2012-01-01	31.4286
2012-04-01	44.0482
2012-07-01	43.6212
2012-10-01	43.6841
2013-01-01	42.9912
2013-04-01	42.8585
2013-07-01	49.2766
2013-10-01	49.2763
2014-01-01	35.9796
2014-04-01	36.1191
2014-07-01	34.9970
2014-10-01	34.2616
2015-01-01	33.4355
2015-04-01	31.5598