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 0.615
1988-10-01 0.638
1989-01-01 0.619
1989-04-01 0.618
1989-07-01 2.149
1989-10-01 2.184
1990-01-01 2.364
1990-04-01 2.406
1990-07-01 2.465
1990-10-01 2.300
1991-01-01 2.242
1991-04-01 2.221
1991-07-01 2.524
1991-10-01 2.573
1992-01-01 2.518
1992-04-01 2.567
1992-07-01 2.623
1992-10-01 2.411
1993-01-01 2.530
1993-04-01 2.506
1993-07-01 2.428
1993-10-01 2.398
1994-01-01 2.486
1994-04-01 2.520
1994-07-01 2.397
1994-10-01 2.537
1995-01-01 3.352
1995-04-01 3.367
1995-07-01 3.497
1995-10-01 4.030
1996-01-01 4.229
1996-04-01 4.447
1996-07-01 5.966
1996-10-01 7.642
1997-01-01 10.322
1997-04-01 11.816
1997-07-01 13.095
1997-10-01 14.010
1998-01-01 13.730
1998-04-01 15.433
1998-07-01 17.596
1998-10-01 18.113
1999-01-01 19.322
1999-04-01 19.221
1999-07-01 20.710
1999-10-01 21.810
2000-01-01 23.063
2000-04-01 24.516
2000-07-01 24.434
2000-10-01 29.068
2001-01-01 31.502
2001-04-01 33.350
2001-07-01 32.184
2001-10-01 31.768
2002-01-01 34.719
2002-04-01 39.406
2002-07-01 36.869
2002-10-01 38.992
2003-01-01 49.554
2003-04-01 61.629
2003-07-01 66.623
2003-10-01 80.419
2004-01-01 95.060
2004-04-01 105.143
2004-07-01 118.871
2004-10-01 136.247
2005-01-01 147.094
2005-04-01 156.093
2005-07-01 163.973
2005-10-01 173.332
2006-01-01 185.496
2006-04-01 209.351
2006-07-01 225.473
2006-10-01 259.242
2007-01-01 277.534
2007-04-01 291.926
2007-07-01 319.558
2007-10-01 331.975
2008-01-01 369.126
2008-04-01 365.579
2008-07-01 326.458
2008-10-01 294.168
2009-01-01 266.832
2009-04-01 286.699
2009-07-01 316.614
2009-10-01 309.319
2010-01-01 311.474
2010-04-01 274.000
2010-07-01 267.851
2010-10-01 254.295
2011-01-01 264.298
2011-04-01 265.457
2011-07-01 230.150
2011-10-01 216.234
2012-01-01 207.240
2012-04-01 193.391
2012-07-01 175.096
2012-10-01 181.776
2013-01-01 176.553
2013-04-01 167.636
2013-07-01 162.061
2013-10-01 168.728
2014-01-01 165.482
2014-04-01 162.833
2014-07-01 146.180
2014-10-01 136.528
2015-01-01 115.637
2015-04-01 119.234