Quarterly Billions of US Dollars
1987-01-01 0.242
1987-04-01 0.175
1987-07-01 0.175
1987-10-01 0.194
1988-01-01 0.188
1988-04-01 0.179
1988-07-01 0.100
1988-10-01 0.106
1989-01-01 0.170
1989-04-01 0.161
1989-07-01 0.166
1989-10-01 0.166
1990-01-01 0.159
1990-04-01 0.416
1990-07-01 0.759
1990-10-01 1.220
1991-01-01 1.191
1991-04-01 1.180
1991-07-01 1.200
1991-10-01 1.231
1992-01-01 1.197
1992-04-01 0.961
1992-07-01 0.990
1992-10-01 0.962
1993-01-01 0.952
1993-04-01 0.994
1993-07-01 0.969
1993-10-01 0.852
1994-01-01 0.886
1994-04-01 0.904
1994-07-01 0.907
1994-10-01 0.980
1995-01-01 1.156
1995-04-01 0.784
1995-07-01 0.407
1995-10-01 0.403
1996-01-01 0.526
1996-04-01 0.512
1996-07-01 0.512
1996-10-01 0.973
1997-01-01 1.232
1997-04-01 1.214
1997-07-01 1.208
1997-10-01 2.054
1998-01-01 2.290
1998-04-01 4.094
1998-07-01 4.258
1998-10-01 4.897
1999-01-01 5.535
1999-04-01 7.138
1999-07-01 7.217
1999-10-01 7.757
2000-01-01 8.899
2000-04-01 9.667
2000-07-01 9.226
2000-10-01 10.111
2001-01-01 10.498
2001-04-01 12.364
2001-07-01 14.036
2001-10-01 16.810
2002-01-01 16.989
2002-04-01 23.045
2002-07-01 23.490
2002-10-01 26.229
2003-01-01 31.127
2003-04-01 36.588
2003-07-01 38.560
2003-10-01 52.194
2004-01-01 53.404
2004-04-01 59.560
2004-07-01 62.737
2004-10-01 78.565
2005-01-01 79.617
2005-04-01 87.994
2005-07-01 92.820
2005-10-01 107.445
2006-01-01 131.061
2006-04-01 166.313
2006-07-01 175.720
2006-10-01 196.658
2007-01-01 218.740
2007-04-01 241.393
2007-07-01 270.781
2007-10-01 284.279
2008-01-01 308.753
2008-04-01 333.186
2008-07-01 313.554
2008-10-01 333.634
2009-01-01 348.825
2009-04-01 389.625
2009-07-01 421.874
2009-10-01 427.129
2010-01-01 408.685
2010-04-01 381.343
2010-07-01 439.082
2010-10-01 438.589
2011-01-01 484.583
2011-04-01 502.467
2011-07-01 481.129
2011-10-01 469.685
2012-01-01 522.059
2012-04-01 486.658
2012-07-01 493.247
2012-10-01 522.773
2013-01-01 504.954
2013-04-01 511.869
2013-07-01 525.370
2013-10-01 532.211
2014-01-01 511.428
2014-04-01 505.691
2014-07-01 454.026
2014-10-01 432.503
2015-01-01 385.549
2015-04-01 393.704