Quarterly Billions of US Dollars
1987-01-01 0.401
1987-04-01 0.436
1987-07-01 0.544
1987-10-01 0.374
1988-01-01 0.565
1988-04-01 0.412
1988-07-01 0.348
1988-10-01 0.617
1989-01-01 0.725
1989-04-01 0.363
1989-07-01 0.590
1989-10-01 0.404
1990-01-01 0.369
1990-04-01 0.221
1990-07-01 0.318
1990-10-01 0.401
1991-01-01 0.190
1991-04-01 0.882
1991-07-01 1.089
1991-10-01 1.525
1992-01-01 1.886
1992-04-01 2.306
1992-07-01 2.414
1992-10-01 4.242
1993-01-01 3.029
1993-04-01 4.199
1993-07-01 3.279
1993-10-01 4.666
1994-01-01 5.042
1994-04-01 6.201
1994-07-01 6.642
1994-10-01 6.702
1995-01-01 8.326
1995-04-01 8.850
1995-07-01 8.827
1995-10-01 10.378
1996-01-01 11.301
1996-04-01 13.314
1996-07-01 15.534
1996-10-01 17.247
1997-01-01 19.670
1997-04-01 21.084
1997-07-01 21.842
1997-10-01 22.672
1998-01-01 25.557
1998-04-01 23.051
1998-07-01 25.091
1998-10-01 27.636
1999-01-01 36.696
1999-04-01 40.173
1999-07-01 54.746
1999-10-01 71.728
2000-01-01 82.367
2000-04-01 106.850
2000-07-01 112.675
2000-10-01 125.714
2001-01-01 117.284
2001-04-01 105.633
2001-07-01 96.241
2001-10-01 89.454
2002-01-01 86.298
2002-04-01 91.720
2002-07-01 98.120
2002-10-01 96.823
2003-01-01 122.464
2003-04-01 116.029
2003-07-01 99.666
2003-10-01 121.245
2004-01-01 117.630
2004-04-01 119.774
2004-07-01 118.348
2004-10-01 125.930
2005-01-01 122.576
2005-04-01 113.523
2005-07-01 100.177
2005-10-01 96.862
2006-01-01 108.640
2006-04-01 117.028
2006-07-01 114.569
2006-10-01 114.417
2007-01-01 128.610
2007-04-01 156.214
2007-07-01 170.537
2007-10-01 192.268
2008-01-01 202.053
2008-04-01 208.035
2008-07-01 184.389
2008-10-01 142.374
2009-01-01 120.664
2009-04-01 114.109
2009-07-01 110.610
2009-10-01 96.283
2010-01-01 102.505
2010-04-01 98.548
2010-07-01 104.369
2010-10-01 103.908
2011-01-01 120.806
2011-04-01 128.253
2011-07-01 160.967
2011-10-01 164.385
2012-01-01 165.398
2012-04-01 173.739
2012-07-01 147.161
2012-10-01 140.947
2013-01-01 151.131
2013-04-01 164.280
2013-07-01 163.933
2013-10-01 140.415
2014-01-01 152.361
2014-04-01 159.114
2014-07-01 162.514
2014-10-01 156.584
2015-01-01 170.758
2015-04-01 163.634