Quarter	Billions of US Dollars
1993-07-01	1.299
1993-10-01	1.139
1994-01-01	0.767
1994-04-01	0.741
1994-07-01	1.030
1994-10-01	1.069
1995-01-01	1.183
1995-04-01	0.992
1995-07-01	0.470
1995-10-01	0.536
1996-01-01	0.364
1996-04-01	0.402
1996-07-01	0.240
1996-10-01	0.061
1997-01-01	0.346
1997-04-01	0.528
1997-07-01	0.614
1997-10-01	0.377
1998-01-01	0.342
1998-04-01	0.345
1998-07-01	0.386
1998-10-01	0.430
1999-01-01	0.256
1999-04-01	0.471
1999-07-01	1.135
1999-10-01	2.333
2000-01-01	1.414
2000-04-01	1.483
2000-07-01	1.787
2000-10-01	1.769
2001-01-01	2.350
2001-04-01	2.746
2001-07-01	3.145
2001-10-01	3.791
2002-01-01	3.891
2002-04-01	3.786
2002-07-01	3.223
2002-10-01	2.130
2003-01-01	2.103
2003-04-01	3.484
2003-07-01	6.444
2003-10-01	6.534
2004-01-01	7.051
2004-04-01	5.611
2004-07-01	4.311
2004-10-01	10.145
2005-01-01	10.661
2005-04-01	15.560
2005-07-01	14.960
2005-10-01	22.478
2006-01-01	22.111
2006-04-01	17.819
2006-07-01	29.367
2006-10-01	29.762
2007-01-01	37.898
2007-04-01	50.687
2007-07-01	55.645
2007-10-01	62.931
2008-01-01	76.609
2008-04-01	89.931
2008-07-01	97.612
2008-10-01	88.684
2009-01-01	109.537
2009-04-01	136.996
2009-07-01	136.377
2009-10-01	127.156
2010-01-01	116.255
2010-04-01	96.021
2010-07-01	101.752
2010-10-01	99.989
2011-01-01	98.373
2011-04-01	96.406
2011-07-01	103.630
2011-10-01	98.552
2012-01-01	113.380
2012-04-01	101.505
2012-07-01	103.789
2012-10-01	101.007
2013-01-01	111.674
2013-04-01	102.046
2013-07-01	102.495
2013-10-01	115.390
2014-01-01	98.011
2014-04-01	98.044
2014-07-01	86.601
2014-10-01	81.299
2015-01-01	94.780
2015-04-01	100.776