Quarter	Billions of US Dollars
1993-07-01	19.9431
1993-10-01	18.3729
1994-01-01	21.5290
1994-04-01	16.4039
1994-07-01	16.7081
1994-10-01	14.4797
1995-01-01	15.8552
1995-04-01	16.2846
1995-07-01	18.2531
1995-10-01	16.8951
1996-01-01	19.5118
1996-04-01	20.0555
1996-07-01	21.6926
1996-10-01	19.6781
1997-01-01	20.5919
1997-04-01	20.2666
1997-07-01	21.7982
1997-10-01	18.5673
1998-01-01	22.0861
1998-04-01	16.0319
1998-07-01	19.9118
1998-10-01	18.9838
1999-01-01	26.0119
1999-04-01	19.9045
1999-07-01	22.7095
1999-10-01	21.4047
2000-01-01	24.6653
2000-04-01	20.2726
2000-07-01	23.0651
2000-10-01	24.0082
2001-01-01	26.0758
2001-04-01	25.3949
2001-07-01	24.2412
2001-10-01	23.0429
2002-01-01	25.3955
2002-04-01	29.3056
2002-07-01	29.6301
2002-10-01	28.9602
2003-01-01	30.4242
2003-04-01	28.9132
2003-07-01	29.3192
2003-10-01	38.8654
2004-01-01	41.7739
2004-04-01	35.3453
2004-07-01	41.3153
2004-10-01	43.1649
2005-01-01	38.9044
2005-04-01	41.8079
2005-07-01	41.8871
2005-10-01	43.3809
2006-01-01	49.9733
2006-04-01	53.5131
2006-07-01	58.0349
2006-10-01	58.3513
2007-01-01	57.2867
2007-04-01	68.7351
2007-07-01	61.3957
2007-10-01	56.3831
2008-01-01	80.9399
2008-04-01	79.5814
2008-07-01	62.0243
2008-10-01	28.0872
2009-01-01	30.0449
2009-04-01	41.1277
2009-07-01	50.8569
2009-10-01	44.1846
2010-01-01	41.8475
2010-04-01	40.8002
2010-07-01	41.5086
2010-10-01	39.0320
2011-01-01	36.8681
2011-04-01	43.8789
2011-07-01	35.5725
2011-10-01	33.5383
2012-01-01	35.9929
2012-04-01	33.7239
2012-07-01	26.5692
2012-10-01	32.9597
2013-01-01	34.8150
2013-04-01	30.2847
2013-07-01	34.5028
2013-10-01	33.7212
2014-01-01	38.3855
2014-04-01	41.3818
2014-07-01	34.2606
2014-10-01	26.7726
2015-01-01	27.5051
2015-04-01	23.7824