Quarter	Billions of US Dollars
1993-07-01	10.769
1993-10-01	10.310
1994-01-01	11.735
1994-04-01	11.272
1994-07-01	11.831
1994-10-01	11.355
1995-01-01	11.831
1995-04-01	11.453
1995-07-01	11.107
1995-10-01	11.113
1996-01-01	11.552
1996-04-01	11.699
1996-07-01	13.349
1996-10-01	14.152
1997-01-01	13.959
1997-04-01	15.353
1997-07-01	15.268
1997-10-01	16.221
1998-01-01	16.196
1998-04-01	20.620
1998-07-01	20.394
1998-10-01	21.588
1999-01-01	23.087
1999-04-01	24.663
1999-07-01	24.430
1999-10-01	25.718
2000-01-01	26.261
2000-04-01	26.613
2000-07-01	26.976
2000-10-01	27.652
2001-01-01	27.005
2001-04-01	28.709
2001-07-01	29.232
2001-10-01	29.530
2002-01-01	31.385
2002-04-01	31.203
2002-07-01	33.868
2002-10-01	33.624
2003-01-01	34.347
2003-04-01	34.633
2003-07-01	35.267
2003-10-01	37.317
2004-01-01	37.832
2004-04-01	38.886
2004-07-01	40.459
2004-10-01	42.450
2005-01-01	43.383
2005-04-01	45.385
2005-07-01	44.874
2005-10-01	46.573
2006-01-01	51.505
2006-04-01	51.068
2006-07-01	52.056
2006-10-01	51.166
2007-01-01	53.717
2007-04-01	52.397
2007-07-01	52.249
2007-10-01	52.352
2008-01-01	55.220
2008-04-01	53.855
2008-07-01	53.350
2008-10-01	51.782
2009-01-01	56.373
2009-04-01	58.820
2009-07-01	60.074
2009-10-01	60.771
2010-01-01	64.606
2010-04-01	65.708
2010-07-01	67.206
2010-10-01	69.794
2011-01-01	71.413
2011-04-01	73.585
2011-07-01	77.811
2011-10-01	77.054
2012-01-01	81.830
2012-04-01	90.356
2012-07-01	92.366
2012-10-01	93.710
2013-01-01	92.389
2013-04-01	94.170
2013-07-01	97.530
2013-10-01	98.286
2014-01-01	102.955
2014-04-01	106.129
2014-07-01	105.138
2014-10-01	110.928
2015-01-01	117.600
2015-04-01	115.622