Quarter	Billions of US Dollars
1987-01-01	7.5120
1987-04-01	8.1570
1987-07-01	10.3710
1987-10-01	11.1300
1988-01-01	9.5750
1988-04-01	11.3860
1988-07-01	12.9410
1988-10-01	13.0800
1989-01-01	14.2970
1989-04-01	13.1240
1989-07-01	15.3270
1989-10-01	17.2040
1990-01-01	19.5860
1990-04-01	17.8790
1990-07-01	18.9510
1990-10-01	18.0560
1991-01-01	20.1390
1991-04-01	18.2670
1991-07-01	18.8660
1991-10-01	19.5650
1992-01-01	18.9380
1992-04-01	20.3170
1992-07-01	21.9500
1992-10-01	20.3820
1993-01-01	20.1400
1993-04-01	21.1920
1993-07-01	24.8056
1993-10-01	24.2780
1994-01-01	25.4265
1994-04-01	21.9611
1994-07-01	20.8993
1994-10-01	18.7028
1995-01-01	19.8180
1995-04-01	21.2709
1995-07-01	23.3143
1995-10-01	22.0058
1996-01-01	23.4812
1996-04-01	24.0635
1996-07-01	27.8439
1996-10-01	25.8275
1997-01-01	27.4484
1997-04-01	26.7210
1997-07-01	28.9659
1997-10-01	23.9854
1998-01-01	26.6313
1998-04-01	22.0397
1998-07-01	26.6754
1998-10-01	27.2256
1999-01-01	32.5706
1999-04-01	28.4107
1999-07-01	32.3841
1999-10-01	33.6172
2000-01-01	33.3541
2000-04-01	28.3869
2000-07-01	30.8912
2000-10-01	34.6365
2001-01-01	34.4113
2001-04-01	32.9087
2001-07-01	32.1437
2001-10-01	31.5252
2002-01-01	33.8684
2002-04-01	38.4756
2002-07-01	38.4088
2002-10-01	37.3633
2003-01-01	37.7292
2003-04-01	39.2138
2003-07-01	37.3391
2003-10-01	49.7611
2004-01-01	51.4177
2004-04-01	45.4247
2004-07-01	50.2686
2004-10-01	54.0099
2005-01-01	48.1079
2005-04-01	49.8619
2005-07-01	50.2144
2005-10-01	51.4793
2006-01-01	57.9291
2006-04-01	66.7061
2006-07-01	71.7111
2006-10-01	73.8824
2007-01-01	74.8385
2007-04-01	85.7580
2007-07-01	81.7193
2007-10-01	72.5078
2008-01-01	94.7555
2008-04-01	96.9642
2008-07-01	73.8293
2008-10-01	41.9062
2009-01-01	37.9160
2009-04-01	48.0890
2009-07-01	56.6360
2009-10-01	50.2464
2010-01-01	48.3538
2010-04-01	46.7135
2010-07-01	48.0040
2010-10-01	48.0011
2011-01-01	44.9635
2011-04-01	52.7329
2011-07-01	43.1271
2011-10-01	39.9052
2012-01-01	41.0957
2012-04-01	41.5627
2012-07-01	38.5347
2012-10-01	44.5245
2013-01-01	46.4422
2013-04-01	45.2859
2013-07-01	50.3621
2013-10-01	47.7132
2014-01-01	49.1528
2014-04-01	56.2611
2014-07-01	50.7241
2014-10-01	46.2996
2015-01-01	42.1657
2015-04-01	40.3949