Quarterly Billions of US Dollars
1987-01-01 0.767
1987-04-01 0.744
1987-07-01 0.715
1987-10-01 0.768
1988-01-01 0.626
1988-04-01 0.600
1988-07-01 0.589
1988-10-01 0.606
1989-01-01 0.509
1989-04-01 0.500
1989-07-01 0.507
1989-10-01 0.515
1990-01-01 0.488
1990-04-01 1.121
1990-07-01 1.239
1990-10-01 1.576
1991-01-01 2.426
1991-04-01 2.473
1991-07-01 2.559
1991-10-01 2.810
1992-01-01 3.032
1992-04-01 3.129
1992-07-01 3.336
1992-10-01 3.714
1993-01-01 3.713
1993-04-01 3.817
1993-07-01 4.523
1993-10-01 5.581
1994-01-01 6.304
1994-04-01 7.349
1994-07-01 8.204
1994-10-01 8.494
1995-01-01 7.833
1995-04-01 8.001
1995-07-01 8.447
1995-10-01 8.485
1996-01-01 8.667
1996-04-01 9.513
1996-07-01 10.226
1996-10-01 9.840
1997-01-01 9.649
1997-04-01 11.729
1997-07-01 12.134
1997-10-01 12.157
1998-01-01 11.999
1998-04-01 14.439
1998-07-01 15.503
1998-10-01 16.380
1999-01-01 16.876
1999-04-01 18.170
1999-07-01 19.639
1999-10-01 20.018
2000-01-01 21.257
2000-04-01 20.040
2000-07-01 19.947
2000-10-01 19.455
2001-01-01 19.733
2001-04-01 20.268
2001-07-01 21.826
2001-10-01 23.477
2002-01-01 26.433
2002-04-01 27.236
2002-07-01 29.248
2002-10-01 30.249
2003-01-01 31.575
2003-04-01 34.641
2003-07-01 38.649
2003-10-01 39.153
2004-01-01 39.917
2004-04-01 41.481
2004-07-01 43.389
2004-10-01 44.376
2005-01-01 44.799
2005-04-01 42.536
2005-07-01 43.646
2005-10-01 44.484
2006-01-01 45.921
2006-04-01 46.687
2006-07-01 46.785
2006-10-01 53.809
2007-01-01 58.901
2007-04-01 62.573
2007-07-01 59.474
2007-10-01 64.677
2008-01-01 67.356
2008-04-01 73.263
2008-07-01 72.495
2008-10-01 69.421
2009-01-01 67.291
2009-04-01 67.189
2009-07-01 71.316
2009-10-01 81.343
2010-01-01 83.262
2010-04-01 81.901
2010-07-01 88.639
2010-10-01 87.868
2011-01-01 96.752
2011-04-01 100.098
2011-07-01 99.000
2011-10-01 102.146
2012-01-01 116.662
2012-04-01 118.795
2012-07-01 121.877
2012-10-01 126.192
2013-01-01 128.039
2013-04-01 142.873
2013-07-01 145.063
2013-10-01 144.864
2014-01-01 159.537
2014-04-01 171.781
2014-07-01 171.803
2014-10-01 168.885
2015-01-01 164.909
2015-04-01 166.658