Quarter	Billions of US Dollars
1993-07-01	21.477
1993-10-01	22.352
1994-01-01	31.694
1994-04-01	18.370
1994-07-01	22.657
1994-10-01	20.963
1995-01-01	18.708
1995-04-01	24.200
1995-07-01	31.716
1995-10-01	25.632
1996-01-01	42.314
1996-04-01	45.926
1996-07-01	54.629
1996-10-01	56.588
1997-01-01	55.261
1997-04-01	53.927
1997-07-01	67.335
1997-10-01	57.285
1998-01-01	56.273
1998-04-01	68.970
1998-07-01	58.336
1998-10-01	38.091
1999-01-01	91.316
1999-04-01	102.738
1999-07-01	86.116
1999-10-01	74.007
2000-01-01	88.410
2000-04-01	110.179
2000-07-01	101.925
2000-10-01	105.427
2001-01-01	125.509
2001-04-01	134.577
2001-07-01	107.360
2001-10-01	140.325
2002-01-01	114.383
2002-04-01	127.223
2002-07-01	113.467
2002-10-01	131.049
2003-01-01	181.513
2003-04-01	189.460
2003-07-01	182.992
2003-10-01	206.685
2004-01-01	275.628
2004-04-01	253.920
2004-07-01	231.915
2004-10-01	267.000
2005-01-01	278.600
2005-04-01	335.672
2005-07-01	229.471
2005-10-01	387.408
2006-01-01	348.147
2006-04-01	415.722
2006-07-01	395.343
2006-10-01	571.383
2007-01-01	571.045
2007-04-01	581.286
2007-07-01	266.724
2007-10-01	245.056
2008-01-01	279.661
2008-04-01	526.274
2008-07-01	426.709
2008-10-01	641.595
2009-01-01	348.431
2009-04-01	305.020
2009-07-01	230.214
2009-10-01	223.887
2010-01-01	267.938
2010-04-01	213.002
2010-07-01	221.912
2010-10-01	207.757
2011-01-01	256.753
2011-04-01	263.139
2011-07-01	180.891
2011-10-01	249.210
2012-01-01	252.710
2012-04-01	184.740
2012-07-01	182.743
2012-10-01	162.674
2013-01-01	193.244
2013-04-01	206.601
2013-07-01	198.144
2013-10-01	217.706
2014-01-01	224.199
2014-04-01	266.315
2014-07-01	184.462
2014-10-01	168.110
2015-01-01	215.137
2015-04-01	173.061