Quarter	Billions of US Dollars
1993-07-01	190.113
1993-10-01	182.279
1994-01-01	187.406
1994-04-01	185.549
1994-07-01	179.097
1994-10-01	168.485
1995-01-01	170.506
1995-04-01	163.458
1995-07-01	154.022
1995-10-01	154.179
1996-01-01	153.992
1996-04-01	155.985
1996-07-01	156.349
1996-10-01	153.398
1997-01-01	148.940
1997-04-01	154.170
1997-07-01	152.838
1997-10-01	147.031
1998-01-01	143.142
1998-04-01	145.694
1998-07-01	156.034
1998-10-01	161.872
1999-01-01	158.624
1999-04-01	165.135
1999-07-01	176.087
1999-10-01	177.112
2000-01-01	173.713
2000-04-01	176.302
2000-07-01	173.682
2000-10-01	184.553
2001-01-01	187.235
2001-04-01	191.132
2001-07-01	203.169
2001-10-01	209.961
2002-01-01	210.858
2002-04-01	235.534
2002-07-01	232.139
2002-10-01	236.439
2003-01-01	239.358
2003-04-01	243.566
2003-07-01	250.723
2003-10-01	272.872
2004-01-01	268.025
2004-04-01	273.649
2004-07-01	269.525
2004-10-01	277.532
2005-01-01	270.923
2005-04-01	258.566
2005-07-01	249.184
2005-10-01	242.909
2006-01-01	249.798
2006-04-01	258.894
2006-07-01	253.374
2006-10-01	263.765
2007-01-01	265.038
2007-04-01	276.781
2007-07-01	292.158
2007-10-01	304.000
2008-01-01	315.558
2008-04-01	322.782
2008-07-01	304.685
2008-10-01	304.395
2009-01-01	289.492
2009-04-01	298.828
2009-07-01	308.819
2009-10-01	313.738
2010-01-01	310.733
2010-04-01	309.289
2010-07-01	330.463
2010-10-01	335.203
2011-01-01	341.919
2011-04-01	339.069
2011-07-01	329.770
2011-10-01	325.139
2012-01-01	328.782
2012-04-01	316.475
2012-07-01	323.780
2012-10-01	318.955
2013-01-01	320.188
2013-04-01	328.881
2013-07-01	340.942
2013-10-01	376.602
2014-01-01	391.208
2014-04-01	406.854
2014-07-01	408.056
2014-10-01	403.629
2015-01-01	395.008
2015-04-01	414.260