Quarterly Billions of US Dollars
1987-01-01 0.516
1987-04-01 0.516
1987-07-01 0.515
1987-10-01 0.537
1988-01-01 0.544
1988-04-01 0.531
1988-07-01 0.521
1988-10-01 0.539
1989-01-01 0.529
1989-04-01 0.528
1989-07-01 1.977
1989-10-01 2.001
1990-01-01 2.042
1990-04-01 2.070
1990-07-01 2.038
1990-10-01 1.875
1991-01-01 1.859
1991-04-01 1.858
1991-07-01 1.894
1991-10-01 1.897
1992-01-01 1.894
1992-04-01 1.898
1992-07-01 1.896
1992-10-01 1.780
1993-01-01 1.780
1993-04-01 1.780
1993-07-01 1.780
1993-10-01 1.780
1994-01-01 1.785
1994-04-01 1.787
1994-07-01 1.789
1994-10-01 1.788
1995-01-01 2.039
1995-04-01 2.019
1995-07-01 2.227
1995-10-01 2.281
1996-01-01 2.382
1996-04-01 2.452
1996-07-01 2.788
1996-10-01 3.127
1997-01-01 3.522
1997-04-01 3.592
1997-07-01 3.683
1997-10-01 3.301
1998-01-01 3.310
1998-04-01 3.527
1998-07-01 3.407
1998-10-01 3.560
1999-01-01 3.398
1999-04-01 3.268
1999-07-01 3.317
1999-10-01 3.515
2000-01-01 5.230
2000-04-01 6.190
2000-07-01 5.995
2000-10-01 5.810
2001-01-01 8.396
2001-04-01 8.018
2001-07-01 8.520
2001-10-01 7.923
2002-01-01 9.264
2002-04-01 9.780
2002-07-01 10.347
2002-10-01 11.406
2003-01-01 13.455
2003-04-01 15.345
2003-07-01 18.567
2003-10-01 22.362
2004-01-01 26.444
2004-04-01 28.938
2004-07-01 35.865
2004-10-01 41.918
2005-01-01 46.004
2005-04-01 50.599
2005-07-01 55.241
2005-10-01 62.982
2006-01-01 68.068
2006-04-01 77.341
2006-07-01 89.683
2006-10-01 103.361
2007-01-01 115.850
2007-04-01 125.595
2007-07-01 137.429
2007-10-01 142.769
2008-01-01 156.895
2008-04-01 155.442
2008-07-01 136.198
2008-10-01 133.875
2009-01-01 122.471
2009-04-01 138.717
2009-07-01 155.502
2009-10-01 162.316
2010-01-01 169.585
2010-04-01 153.028
2010-07-01 123.209
2010-10-01 114.693
2011-01-01 124.223
2011-04-01 120.865
2011-07-01 100.119
2011-10-01 93.784
2012-01-01 85.805
2012-04-01 82.874
2012-07-01 59.144
2012-10-01 62.908
2013-01-01 59.807
2013-04-01 51.250
2013-07-01 48.024
2013-10-01 53.224
2014-01-01 51.369
2014-04-01 51.507
2014-07-01 46.530
2014-10-01 42.098
2015-01-01 36.984
2015-04-01 37.979