Quarter	Billions of US Dollars
1993-07-01	0.8031
1993-10-01	1.5679
1994-01-01	1.6865
1994-04-01	2.5121
1994-07-01	2.7295
1994-10-01	3.3537
1995-01-01	3.5020
1995-04-01	3.0086
1995-07-01	3.8653
1995-10-01	4.6600
1996-01-01	5.6766
1996-04-01	9.5755
1996-07-01	6.2736
1996-10-01	8.2058
1997-01-01	8.2972
1997-04-01	7.7980
1997-07-01	8.6800
1997-10-01	5.7857
1998-01-01	8.3354
1998-04-01	8.4498
1998-07-01	6.4093
1998-10-01	4.1974
1999-01-01	2.8148
1999-04-01	3.8600
1999-07-01	5.8227
1999-10-01	6.1564
2000-01-01	7.4800
2000-04-01	7.2087
2000-07-01	5.6522
2000-10-01	5.2696
2001-01-01	4.8886
2001-04-01	4.8962
2001-07-01	5.6094
2001-10-01	6.2918
2002-01-01	4.8003
2002-04-01	4.5123
2002-07-01	4.1183
2002-10-01	4.2571
2003-01-01	6.8514
2003-04-01	6.9464
2003-07-01	7.2334
2003-10-01	7.3379
2004-01-01	6.6859
2004-04-01	7.4319
2004-07-01	7.3263
2004-10-01	7.0666
2005-01-01	6.2606
2005-04-01	5.5565
2005-07-01	6.1549
2005-10-01	5.6499
2006-01-01	6.8994
2006-04-01	7.2955
2006-07-01	7.6610
2006-10-01	8.9972
2007-01-01	10.2558
2007-04-01	11.6455
2007-07-01	7.4706
2007-10-01	7.8462
2008-01-01	10.9974
2008-04-01	11.2045
2008-07-01	10.3723
2008-10-01	9.7599
2009-01-01	7.9706
2009-04-01	9.1192
2009-07-01	10.5651
2009-10-01	10.5059
2010-01-01	10.4178
2010-04-01	8.0523
2010-07-01	9.1773
2010-10-01	8.8396
2011-01-01	7.8675
2011-04-01	9.3899
2011-07-01	7.5287
2011-10-01	8.5617
2012-01-01	12.9130
2012-04-01	14.7904
2012-07-01	16.5389
2012-10-01	20.3108
2013-01-01	20.9177
2013-04-01	22.9722
2013-07-01	21.9286
2013-10-01	22.7996
2014-01-01	27.7782
2014-04-01	28.2556
2014-07-01	26.0511
2014-10-01	23.4956
2015-01-01	23.1841
2015-04-01	23.8175