Quarter	Billions of US Dollars
1993-07-01	1.4739
1993-10-01	1.6163
1994-01-01	2.8524
1994-04-01	3.0271
1994-07-01	3.1967
1994-10-01	3.7484
1995-01-01	4.2060
1995-04-01	4.1803
1995-07-01	4.3246
1995-10-01	4.2934
1996-01-01	4.7428
1996-04-01	4.7709
1996-07-01	4.8113
1996-10-01	4.8721
1997-01-01	5.0602
1997-04-01	6.2681
1997-07-01	6.4435
1997-10-01	7.2413
1998-01-01	6.8787
1998-04-01	7.4139
1998-07-01	9.1476
1998-10-01	9.6081
1999-01-01	7.8467
1999-04-01	8.2252
1999-07-01	8.7804
1999-10-01	8.0561
2000-01-01	8.2092
2000-04-01	8.9273
2000-07-01	8.1995
2000-10-01	8.6523
2001-01-01	8.7340
2001-04-01	8.5650
2001-07-01	8.7786
2001-10-01	8.8839
2002-01-01	9.9301
2002-04-01	11.9737
2002-07-01	12.2579
2002-10-01	12.2790
2003-01-01	13.8822
2003-04-01	14.5645
2003-07-01	16.5387
2003-10-01	18.2543
2004-01-01	18.1858
2004-04-01	18.5780
2004-07-01	20.4019
2004-10-01	23.4035
2005-01-01	20.5332
2005-04-01	18.7964
2005-07-01	18.5759
2005-10-01	18.5306
2006-01-01	23.1512
2006-04-01	25.4986
2006-07-01	24.5341
2006-10-01	27.0073
2007-01-01	27.4248
2007-04-01	27.6409
2007-07-01	28.6915
2007-10-01	30.2235
2008-01-01	35.7264
2008-04-01	30.9708
2008-07-01	28.4471
2008-10-01	29.0272
2009-01-01	24.8850
2009-04-01	24.9120
2009-07-01	25.8095
2009-10-01	23.5326
2010-01-01	19.8342
2010-04-01	19.0722
2010-07-01	21.1075
2010-10-01	23.6264
2011-01-01	23.3542
2011-04-01	27.0275
2011-07-01	24.2644
2011-10-01	23.0269
2012-01-01	27.2606
2012-04-01	26.4893
2012-07-01	28.3108
2012-10-01	28.0247
2013-01-01	24.9263
2013-04-01	24.3068
2013-07-01	24.6575
2013-10-01	23.3866
2014-01-01	20.4631
2014-04-01	20.1352
2014-07-01	17.5735
2014-10-01	16.8908
2015-01-01	15.5860
2015-04-01	14.3280