Quarter	Billions of US Dollars
1993-07-01	2.0010
1993-10-01	1.6056
1994-01-01	1.8287
1994-04-01	0.9496
1994-07-01	1.8089
1994-10-01	1.2954
1995-01-01	1.5812
1995-04-01	1.1431
1995-07-01	1.4101
1995-10-01	1.2876
1996-01-01	1.0178
1996-04-01	1.2075
1996-07-01	0.8486
1996-10-01	1.6227
1997-01-01	1.2308
1997-04-01	1.0248
1997-07-01	0.9652
1997-10-01	1.7616
1998-01-01	0.5391
1998-04-01	0.3390
1998-07-01	0.5566
1998-10-01	0.7961
1999-01-01	0.7128
1999-04-01	0.7876
1999-07-01	1.9891
1999-10-01	1.1542
2000-01-01	0.6266
2000-04-01	0.7046
2000-07-01	0.5221
2000-10-01	1.2279
2001-01-01	1.2154
2001-04-01	1.1421
2001-07-01	1.0133
2001-10-01	1.0792
2002-01-01	1.2184
2002-04-01	0.8566
2002-07-01	1.2440
2002-10-01	2.3486
2003-01-01	1.9118
2003-04-01	0.7050
2003-07-01	1.8995
2003-10-01	1.4064
2004-01-01	2.8359
2004-04-01	2.6456
2004-07-01	2.3679
2004-10-01	5.2167
2005-01-01	4.1045
2005-04-01	4.1154
2005-07-01	4.4485
2005-10-01	5.2900
2006-01-01	6.8984
2006-04-01	6.4269
2006-07-01	5.7216
2006-10-01	4.2535
2007-01-01	4.8107
2007-04-01	5.5711
2007-07-01	3.8615
2007-10-01	3.5889
2008-01-01	3.9365
2008-04-01	6.9880
2008-07-01	8.1208
2008-10-01	7.8295
2009-01-01	10.2636
2009-04-01	12.5206
2009-07-01	14.2191
2009-10-01	12.4803
2010-01-01	11.4148
2010-04-01	11.2705
2010-07-01	11.3080
2010-10-01	13.2925
2011-01-01	10.4614
2011-04-01	12.4663
2011-07-01	11.5957
2011-10-01	8.6863
2012-01-01	9.4998
2012-04-01	7.3094
2012-07-01	9.2607
2012-10-01	3.7576
2013-01-01	9.3589
2013-04-01	8.5353
2013-07-01	6.9356
2013-10-01	6.5152
2014-01-01	8.5617
2014-04-01	7.5018
2014-07-01	4.7065
2014-10-01	6.9866
2015-01-01	4.9898
2015-04-01	5.5143