Quarterly Billions of US Dollars
1987-01-01 4.974
1987-04-01 5.428
1987-07-01 5.556
1987-10-01 5.963
1988-01-01 6.776
1988-04-01 7.409
1988-07-01 7.464
1988-10-01 8.132
1989-01-01 8.619
1989-04-01 8.204
1989-07-01 8.505
1989-10-01 10.155
1990-01-01 10.054
1990-04-01 11.065
1990-07-01 12.217
1990-10-01 12.169
1991-01-01 11.335
1991-04-01 12.409
1991-07-01 13.288
1991-10-01 14.004
1992-01-01 14.102
1992-04-01 15.063
1992-07-01 16.694
1992-10-01 15.725
1993-01-01 17.020
1993-04-01 17.802
1993-07-01 21.593
1993-10-01 22.229
1994-01-01 24.754
1994-04-01 26.244
1994-07-01 26.299
1994-10-01 26.037
1995-01-01 26.663
1995-04-01 26.057
1995-07-01 26.110
1995-10-01 26.027
1996-01-01 28.001
1996-04-01 28.082
1996-07-01 29.661
1996-10-01 30.641
1997-01-01 29.814
1997-04-01 30.726
1997-07-01 30.536
1997-10-01 29.826
1998-01-01 28.487
1998-04-01 27.683
1998-07-01 27.544
1998-10-01 28.526
1999-01-01 27.133
1999-04-01 28.681
1999-07-01 30.983
1999-10-01 32.316
2000-01-01 34.423
2000-04-01 36.468
2000-07-01 36.436
2000-10-01 36.484
2001-01-01 32.913
2001-04-01 32.034
2001-07-01 32.931
2001-10-01 32.097
2002-01-01 32.265
2002-04-01 37.389
2002-07-01 37.779
2002-10-01 38.241
2003-01-01 39.575
2003-04-01 43.493
2003-07-01 46.441
2003-10-01 52.599
2004-01-01 53.040
2004-04-01 50.517
2004-07-01 54.241
2004-10-01 57.502
2005-01-01 56.587
2005-04-01 58.733
2005-07-01 58.510
2005-10-01 59.818
2006-01-01 64.860
2006-04-01 69.317
2006-07-01 70.999
2006-10-01 74.361
2007-01-01 78.213
2007-04-01 83.151
2007-07-01 86.828
2007-10-01 92.311
2008-01-01 95.776
2008-04-01 98.274
2008-07-01 95.532
2008-10-01 92.624
2009-01-01 93.788
2009-04-01 101.558
2009-07-01 113.801
2009-10-01 119.837
2010-01-01 119.139
2010-04-01 114.601
2010-07-01 124.903
2010-10-01 126.371
2011-01-01 131.080
2011-04-01 138.024
2011-07-01 132.475
2011-10-01 127.952
2012-01-01 132.495
2012-04-01 133.409
2012-07-01 138.049
2012-10-01 147.288
2013-01-01 150.159
2013-04-01 150.017
2013-07-01 154.643
2013-10-01 151.548
2014-01-01 151.035
2014-04-01 147.453
2014-07-01 142.647
2014-10-01 139.669
2015-01-01 128.488
2015-04-01 136.048