Quarter	Billions of US Dollars
1993-07-01	4.815
1993-10-01	4.888
1994-01-01	5.209
1994-04-01	5.469
1994-07-01	5.159
1994-10-01	4.180
1995-01-01	4.399
1995-04-01	6.410
1995-07-01	7.632
1995-10-01	7.342
1996-01-01	8.221
1996-04-01	9.674
1996-07-01	6.553
1996-10-01	11.285
1997-01-01	11.601
1997-04-01	12.616
1997-07-01	13.452
1997-10-01	13.495
1998-01-01	16.063
1998-04-01	15.372
1998-07-01	12.072
1998-10-01	14.616
1999-01-01	13.047
1999-04-01	14.142
1999-07-01	16.965
1999-10-01	17.480
2000-01-01	16.278
2000-04-01	19.405
2000-07-01	19.775
2000-10-01	23.153
2001-01-01	23.046
2001-04-01	25.197
2001-07-01	29.117
2001-10-01	30.276
2002-01-01	29.972
2002-04-01	35.411
2002-07-01	27.651
2002-10-01	27.561
2003-01-01	26.031
2003-04-01	23.926
2003-07-01	28.363
2003-10-01	43.159
2004-01-01	38.562
2004-04-01	42.602
2004-07-01	37.788
2004-10-01	44.459
2005-01-01	48.882
2005-04-01	40.627
2005-07-01	42.827
2005-10-01	43.804
2006-01-01	52.374
2006-04-01	60.791
2006-07-01	60.744
2006-10-01	66.327
2007-01-01	65.059
2007-04-01	65.424
2007-07-01	74.511
2007-10-01	79.589
2008-01-01	84.509
2008-04-01	96.440
2008-07-01	85.989
2008-10-01	62.316
2009-01-01	60.712
2009-04-01	68.334
2009-07-01	77.623
2009-10-01	81.358
2010-01-01	82.612
2010-04-01	77.375
2010-07-01	80.533
2010-10-01	70.761
2011-01-01	70.765
2011-04-01	67.168
2011-07-01	57.627
2011-10-01	57.918
2012-01-01	73.892
2012-04-01	73.549
2012-07-01	78.872
2012-10-01	76.701
2013-01-01	77.950
2013-04-01	83.288
2013-07-01	97.874
2013-10-01	100.618
2014-01-01	110.847
2014-04-01	114.101
2014-07-01	92.744
2014-10-01	82.872
2015-01-01	72.075
2015-04-01	67.729