Quarter	Billions of US Dollars
1993-07-01	35.511
1993-10-01	33.432
1994-01-01	33.567
1994-04-01	30.213
1994-07-01	29.838
1994-10-01	36.430
1995-01-01	43.118
1995-04-01	47.631
1995-07-01	51.856
1995-10-01	51.037
1996-01-01	49.884
1996-04-01	48.790
1996-07-01	46.038
1996-10-01	63.543
1997-01-01	62.802
1997-04-01	66.266
1997-07-01	65.257
1997-10-01	53.146
1998-01-01	56.280
1998-04-01	54.146
1998-07-01	62.985
1998-10-01	62.578
1999-01-01	53.892
1999-04-01	56.091
1999-07-01	49.242
1999-10-01	46.958
2000-01-01	54.307
2000-04-01	58.745
2000-07-01	54.697
2000-10-01	56.986
2001-01-01	48.057
2001-04-01	51.787
2001-07-01	51.572
2001-10-01	53.486
2002-01-01	62.492
2002-04-01	59.706
2002-07-01	58.832
2002-10-01	62.256
2003-01-01	58.871
2003-04-01	61.553
2003-07-01	58.663
2003-10-01	53.528
2004-01-01	58.071
2004-04-01	59.988
2004-07-01	61.288
2004-10-01	58.586
2005-01-01	70.650
2005-04-01	65.940
2005-07-01	73.536
2005-10-01	79.903
2006-01-01	75.942
2006-04-01	83.557
2006-07-01	71.029
2006-10-01	57.501
2007-01-01	77.000
2007-04-01	111.392
2007-07-01	146.861
2007-10-01	120.872
2008-01-01	134.589
2008-04-01	138.166
2008-07-01	109.965
2008-10-01	123.872
2009-01-01	117.630
2009-04-01	127.098
2009-07-01	122.206
2009-10-01	102.652
2010-01-01	113.526
2010-04-01	99.878
2010-07-01	135.431
2010-10-01	118.534
2011-01-01	156.257
2011-04-01	160.056
2011-07-01	166.443
2011-10-01	166.351
2012-01-01	132.590
2012-04-01	127.809
2012-07-01	113.704
2012-10-01	140.477
2013-01-01	134.454
2013-04-01	118.348
2013-07-01	133.261
2013-10-01	125.330
2014-01-01	141.716
2014-04-01	153.607
2014-07-01	142.072
2014-10-01	141.757
2015-01-01	115.386
2015-04-01	117.222