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	18.2254
1993-10-01	17.5920
1994-01-01	18.3664
1994-04-01	15.7716
1994-07-01	13.4066
1994-10-01	12.7966
1995-01-01	13.4089
1995-04-01	13.2052
1995-07-01	14.5154
1995-10-01	14.0512
1996-01-01	12.9284
1996-04-01	12.2509
1996-07-01	12.9385
1996-10-01	13.2723
1997-01-01	13.4941
1997-04-01	13.8130
1997-07-01	13.8433
1997-10-01	11.1814
1998-01-01	13.0683
1998-04-01	10.3101
1998-07-01	11.6657
1998-10-01	11.8841
1999-01-01	13.0275
1999-04-01	11.2170
1999-07-01	13.1198
1999-10-01	13.8951
2000-01-01	16.3763
2000-04-01	14.2661
2000-07-01	16.1382
2000-10-01	18.9683
2001-01-01	15.7133
2001-04-01	14.7097
2001-07-01	14.6427
2001-10-01	11.7499
2002-01-01	14.4634
2002-04-01	13.5425
2002-07-01	16.0669
2002-10-01	17.5177
2003-01-01	18.3798
2003-04-01	20.5913
2003-07-01	21.7868
2003-10-01	27.0888
2004-01-01	27.7237
2004-04-01	23.6915
2004-07-01	27.9983
2004-10-01	30.1212
2005-01-01	27.1500
2005-04-01	31.7551
2005-07-01	28.0336
2005-10-01	31.1545
2006-01-01	36.4199
2006-04-01	43.2659
2006-07-01	45.5427
2006-10-01	46.9394
2007-01-01	47.9111
2007-04-01	56.2149
2007-07-01	57.7717
2007-10-01	52.5879
2008-01-01	72.4667
2008-04-01	65.0194
2008-07-01	52.1505
2008-10-01	27.8932
2009-01-01	27.2592
2009-04-01	28.5888
2009-07-01	28.7944
2009-10-01	28.3805
2010-01-01	23.0313
2010-04-01	25.5383
2010-07-01	22.4751
2010-10-01	31.1063
2011-01-01	30.5381
2011-04-01	35.4041
2011-07-01	33.4739
2011-10-01	32.4607
2012-01-01	28.5781
2012-04-01	31.0856
2012-07-01	32.4718
2012-10-01	38.4503
2013-01-01	33.2065
2013-04-01	28.1843
2013-07-01	32.1416
2013-10-01	36.2331
2014-01-01	31.7489
2014-04-01	31.3972
2014-07-01	29.1897
2014-10-01	26.4786
2015-01-01	24.7725
2015-04-01	22.8041