Quarter	Billions of US Dollars
1993-07-01	66.211
1993-10-01	68.965
1994-01-01	70.839
1994-04-01	73.906
1994-07-01	75.148
1994-10-01	74.545
1995-01-01	75.215
1995-04-01	75.559
1995-07-01	75.288
1995-10-01	77.541
1996-01-01	80.460
1996-04-01	89.788
1996-07-01	93.196
1996-10-01	98.123
1997-01-01	99.527
1997-04-01	107.757
1997-07-01	109.853
1997-10-01	111.095
1998-01-01	114.783
1998-04-01	121.889
1998-07-01	133.664
1998-10-01	140.686
1999-01-01	139.624
1999-04-01	145.855
1999-07-01	157.355
1999-10-01	161.129
2000-01-01	160.466
2000-04-01	163.707
2000-07-01	163.240
2000-10-01	175.276
2001-01-01	178.828
2001-04-01	182.789
2001-07-01	195.249
2001-10-01	202.347
2002-01-01	203.324
2002-04-01	227.755
2002-07-01	224.179
2002-10-01	228.794
2003-01-01	231.784
2003-04-01	235.827
2003-07-01	243.791
2003-10-01	265.844
2004-01-01	261.812
2004-04-01	268.456
2004-07-01	264.355
2004-10-01	272.403
2005-01-01	265.934
2005-04-01	254.145
2005-07-01	244.753
2005-10-01	237.924
2006-01-01	244.761
2006-04-01	253.751
2006-07-01	248.478
2006-10-01	258.860
2007-01-01	260.149
2007-04-01	272.249
2007-07-01	287.742
2007-10-01	299.485
2008-01-01	310.876
2008-04-01	319.138
2008-07-01	301.531
2008-10-01	301.321
2009-01-01	286.575
2009-04-01	296.231
2009-07-01	306.460
2009-10-01	311.405
2010-01-01	308.664
2010-04-01	307.664
2010-07-01	328.744
2010-10-01	333.507
2011-01-01	340.567
2011-04-01	337.851
2011-07-01	328.615
2011-10-01	324.122
2012-01-01	327.737
2012-04-01	315.482
2012-07-01	322.763
2012-10-01	318.071
2013-01-01	319.330
2013-04-01	328.005
2013-07-01	340.131
2013-10-01	375.913
2014-01-01	390.518
2014-04-01	406.171
2014-07-01	407.427
2014-10-01	403.022
2015-01-01	394.470
2015-04-01	413.701