Quarter	Billions of US Dollars
1993-07-01	26.163
1993-10-01	33.925
1994-01-01	32.409
1994-04-01	25.305
1994-07-01	22.234
1994-10-01	27.271
1995-01-01	36.964
1995-04-01	32.016
1995-07-01	31.101
1995-10-01	33.717
1996-01-01	59.833
1996-04-01	56.418
1996-07-01	56.028
1996-10-01	51.593
1997-01-01	56.509
1997-04-01	44.515
1997-07-01	49.144
1997-10-01	42.674
1998-01-01	84.933
1998-04-01	78.665
1998-07-01	63.639
1998-10-01	59.114
1999-01-01	133.836
1999-04-01	140.739
1999-07-01	127.397
1999-10-01	108.687
2000-01-01	129.767
2000-04-01	120.838
2000-07-01	117.607
2000-10-01	116.335
2001-01-01	206.800
2001-04-01	188.440
2001-07-01	104.506
2001-10-01	185.968
2002-01-01	173.698
2002-04-01	169.597
2002-07-01	117.033
2002-10-01	148.527
2003-01-01	266.367
2003-04-01	309.365
2003-07-01	218.561
2003-10-01	254.575
2004-01-01	355.890
2004-04-01	294.348
2004-07-01	287.049
2004-10-01	315.173
2005-01-01	404.113
2005-04-01	423.075
2005-07-01	254.185
2005-10-01	367.072
2006-01-01	463.472
2006-04-01	437.746
2006-07-01	411.574
2006-10-01	547.443
2007-01-01	599.873
2007-04-01	606.731
2007-07-01	305.156
2007-10-01	373.227
2008-01-01	375.381
2008-04-01	699.031
2008-07-01	347.681
2008-10-01	529.462
2009-01-01	520.321
2009-04-01	639.933
2009-07-01	396.957
2009-10-01	372.161
2010-01-01	524.318
2010-04-01	317.904
2010-07-01	356.056
2010-10-01	302.729
2011-01-01	459.283
2011-04-01	401.483
2011-07-01	259.075
2011-10-01	270.227
2012-01-01	591.026
2012-04-01	263.432
2012-07-01	302.620
2012-10-01	303.439
2013-01-01	316.466
2013-04-01	338.027
2013-07-01	322.572
2013-10-01	410.152
2014-01-01	467.162
2014-04-01	484.069
2014-07-01	303.331
2014-10-01	276.653
2015-01-01	393.607
2015-04-01	299.221