Quarterly Billions of US Dollars
1987-01-01 0.507
1987-04-01 0.760
1987-07-01 0.760
1987-10-01 0.818
1988-01-01 1.108
1988-04-01 1.079
1988-07-01 1.018
1988-10-01 1.008
1989-01-01 0.990
1989-04-01 0.954
1989-07-01 0.963
1989-10-01 0.943
1990-01-01 0.634
1990-04-01 0.627
1990-07-01 0.651
1990-10-01 0.728
1991-01-01 0.688
1991-04-01 0.660
1991-07-01 0.952
1991-10-01 0.988
1992-01-01 0.968
1992-04-01 1.269
1992-07-01 1.293
1992-10-01 1.381
1993-01-01 1.345
1993-04-01 0.992
1993-07-01 1.293
1993-10-01 1.269
1994-01-01 1.242
1994-04-01 1.149
1994-07-01 0.847
1994-10-01 0.885
1995-01-01 1.159
1995-04-01 0.901
1995-07-01 0.874
1995-10-01 0.741
1996-01-01 0.671
1996-04-01 0.656
1996-07-01 0.519
1996-10-01 0.503
1997-01-01 0.958
1997-04-01 0.917
1997-07-01 0.894
1997-10-01 0.686
1998-01-01 0.644
1998-04-01 0.861
1998-07-01 1.342
1998-10-01 1.286
1999-01-01 1.540
1999-04-01 2.234
1999-07-01 3.829
1999-10-01 9.009
2000-01-01 9.009
2000-04-01 10.517
2000-07-01 14.792
2000-10-01 19.711
2001-01-01 22.071
2001-04-01 29.283
2001-07-01 34.983
2001-10-01 47.466
2002-01-01 47.772
2002-04-01 60.527
2002-07-01 63.927
2002-10-01 80.390
2003-01-01 94.572
2003-04-01 104.128
2003-07-01 107.825
2003-10-01 121.969
2004-01-01 123.904
2004-04-01 127.190
2004-07-01 128.417
2004-10-01 147.789
2005-01-01 139.608
2005-04-01 142.559
2005-07-01 141.036
2005-10-01 150.354
2006-01-01 156.870
2006-04-01 167.932
2006-07-01 171.402
2006-10-01 188.691
2007-01-01 198.957
2007-04-01 214.579
2007-07-01 225.040
2007-10-01 233.663
2008-01-01 253.491
2008-04-01 255.479
2008-07-01 251.523
2008-10-01 302.588
2009-01-01 308.880
2009-04-01 333.823
2009-07-01 364.593
2009-10-01 371.057
2010-01-01 343.755
2010-04-01 312.185
2010-07-01 347.970
2010-10-01 345.034
2011-01-01 364.123
2011-04-01 369.484
2011-07-01 340.312
2011-10-01 334.636
2012-01-01 316.724
2012-04-01 291.063
2012-07-01 293.437
2012-10-01 294.965
2013-01-01 281.533
2013-04-01 284.507
2013-07-01 297.220
2013-10-01 309.629
2014-01-01 311.657
2014-04-01 321.354
2014-07-01 294.933
2014-10-01 290.315
2015-01-01 261.774
2015-04-01 276.751