Quarter	Billions of US Dollars
1993-07-01	24.111
1993-10-01	29.614
1994-01-01	30.024
1994-04-01	33.778
1994-07-01	39.051
1994-10-01	38.411
1995-01-01	47.404
1995-04-01	51.927
1995-07-01	56.253
1995-10-01	58.814
1996-01-01	57.123
1996-04-01	63.371
1996-07-01	44.906
1996-10-01	76.158
1997-01-01	72.068
1997-04-01	73.523
1997-07-01	77.191
1997-10-01	79.092
1998-01-01	84.312
1998-04-01	82.752
1998-07-01	89.377
1998-10-01	85.210
1999-01-01	91.690
1999-04-01	91.985
1999-07-01	112.749
1999-10-01	115.252
2000-01-01	123.627
2000-04-01	135.876
2000-07-01	128.221
2000-10-01	141.856
2001-01-01	148.675
2001-04-01	138.826
2001-07-01	142.330
2001-10-01	144.287
2002-01-01	141.558
2002-04-01	153.061
2002-07-01	169.559
2002-10-01	169.765
2003-01-01	205.194
2003-04-01	225.729
2003-07-01	236.331
2003-10-01	268.450
2004-01-01	269.943
2004-04-01	297.415
2004-07-01	314.390
2004-10-01	336.350
2005-01-01	330.221
2005-04-01	338.384
2005-07-01	372.889
2005-10-01	397.486
2006-01-01	422.840
2006-04-01	445.098
2006-07-01	467.542
2006-10-01	499.293
2007-01-01	532.564
2007-04-01	524.914
2007-07-01	574.068
2007-10-01	567.572
2008-01-01	682.082
2008-04-01	713.426
2008-07-01	644.436
2008-10-01	620.040
2009-01-01	568.866
2009-04-01	566.368
2009-07-01	582.654
2009-10-01	532.862
2010-01-01	540.043
2010-04-01	500.593
2010-07-01	558.894
2010-10-01	542.057
2011-01-01	623.845
2011-04-01	674.388
2011-07-01	646.896
2011-10-01	556.549
2012-01-01	545.102
2012-04-01	462.189
2012-07-01	462.641
2012-10-01	451.139
2013-01-01	430.637
2013-04-01	425.443
2013-07-01	433.645
2013-10-01	442.365
2014-01-01	463.288
2014-04-01	474.392
2014-07-01	457.134
2014-10-01	443.055
2015-01-01	399.086
2015-04-01	381.015