Quarterly Billions of US Dollars
1987-01-01 0.205
1987-04-01 0.303
1987-07-01 0.388
1987-10-01 0.492
1988-01-01 0.503
1988-04-01 0.485
1988-07-01 0.475
1988-10-01 0.489
1989-01-01 0.448
1989-04-01 0.428
1989-07-01 0.588
1989-10-01 0.534
1990-01-01 0.647
1990-04-01 0.976
1990-07-01 1.072
1990-10-01 0.828
1991-01-01 0.940
1991-04-01 1.557
1991-07-01 1.499
1991-10-01 1.605
1992-01-01 1.610
1992-04-01 1.608
1992-07-01 1.927
1992-10-01 2.223
1993-01-01 1.347
1993-04-01 1.517
1993-07-01 1.608
1993-10-01 1.539
1994-01-01 1.167
1994-04-01 0.732
1994-07-01 0.564
1994-10-01 0.609
1995-01-01 0.670
1995-04-01 0.860
1995-07-01 0.970
1995-10-01 0.836
1996-01-01 0.664
1996-04-01 0.702
1996-07-01 0.788
1996-10-01 0.545
1997-01-01 0.705
1997-04-01 0.937
1997-07-01 1.023
1997-10-01 0.827
1998-01-01 0.713
1998-04-01 0.744
1998-07-01 0.831
1998-10-01 0.824
1999-01-01 1.830
1999-04-01 1.851
1999-07-01 4.821
1999-10-01 7.449
2000-01-01 5.936
2000-04-01 6.931
2000-07-01 8.114
2000-10-01 8.151
2001-01-01 7.576
2001-04-01 9.461
2001-07-01 10.467
2001-10-01 10.939
2002-01-01 13.015
2002-04-01 14.806
2002-07-01 17.008
2002-10-01 24.348
2003-01-01 33.092
2003-04-01 40.682
2003-07-01 47.998
2003-10-01 58.487
2004-01-01 65.669
2004-04-01 65.180
2004-07-01 67.151
2004-10-01 82.807
2005-01-01 93.482
2005-04-01 109.077
2005-07-01 111.630
2005-10-01 141.086
2006-01-01 184.693
2006-04-01 213.096
2006-07-01 228.974
2006-10-01 244.975
2007-01-01 282.949
2007-04-01 308.854
2007-07-01 327.780
2007-10-01 339.945
2008-01-01 352.826
2008-04-01 383.234
2008-07-01 363.249
2008-10-01 330.494
2009-01-01 319.908
2009-04-01 338.827
2009-07-01 346.084
2009-10-01 349.946
2010-01-01 321.468
2010-04-01 271.824
2010-07-01 313.667
2010-10-01 299.242
2011-01-01 305.222
2011-04-01 287.473
2011-07-01 263.469
2011-10-01 245.236
2012-01-01 253.880
2012-04-01 211.503
2012-07-01 207.253
2012-10-01 203.835
2013-01-01 189.152
2013-04-01 191.213
2013-07-01 181.187
2013-10-01 185.514
2014-01-01 179.264
2014-04-01 181.290
2014-07-01 162.134
2014-10-01 149.889
2015-01-01 133.087
2015-04-01 131.619