Quarterly Billions of US Dollars
1987-01-01 0.587
1987-04-01 0.580
1987-07-01 0.580
1987-10-01 0.595
1988-01-01 0.715
1988-04-01 0.667
1988-07-01 0.611
1988-10-01 0.604
1989-01-01 0.578
1989-04-01 0.499
1989-07-01 0.589
1989-10-01 0.620
1990-01-01 0.568
1990-04-01 0.486
1990-07-01 0.483
1990-10-01 0.489
1991-01-01 0.381
1991-04-01 0.372
1991-07-01 0.366
1991-10-01 0.394
1992-01-01 0.368
1992-04-01 0.392
1992-07-01 0.418
1992-10-01 0.380
1993-01-01 0.321
1993-04-01 0.317
1993-07-01 0.377
1993-10-01 0.359
1994-01-01 0.553
1994-04-01 0.574
1994-07-01 0.828
1994-10-01 0.938
1995-01-01 1.428
1995-04-01 1.512
1995-07-01 1.752
1995-10-01 1.812
1996-01-01 2.033
1996-04-01 2.012
1996-07-01 2.138
1996-10-01 2.370
1997-01-01 2.302
1997-04-01 2.523
1997-07-01 3.065
1997-10-01 3.193
1998-01-01 3.209
1998-04-01 3.428
1998-07-01 3.625
1998-10-01 3.713
1999-01-01 3.925
1999-04-01 3.854
1999-07-01 4.429
1999-10-01 4.793
2000-01-01 5.101
2000-04-01 5.110
2000-07-01 5.903
2000-10-01 6.079
2001-01-01 6.128
2001-04-01 6.487
2001-07-01 7.268
2001-10-01 7.564
2002-01-01 7.432
2002-04-01 9.535
2002-07-01 9.823
2002-10-01 11.667
2003-01-01 12.982
2003-04-01 13.181
2003-07-01 15.860
2003-10-01 16.780
2004-01-01 19.729
2004-04-01 19.582
2004-07-01 20.315
2004-10-01 22.482
2005-01-01 23.046
2005-04-01 24.436
2005-07-01 25.126
2005-10-01 26.072
2006-01-01 30.783
2006-04-01 33.197
2006-07-01 34.299
2006-10-01 42.780
2007-01-01 47.345
2007-04-01 51.554
2007-07-01 56.192
2007-10-01 60.681
2008-01-01 56.324
2008-04-01 59.540
2008-07-01 61.000
2008-10-01 59.844
2009-01-01 57.543
2009-04-01 66.329
2009-07-01 69.193
2009-10-01 69.764
2010-01-01 68.282
2010-04-01 66.429
2010-07-01 76.988
2010-10-01 85.860
2011-01-01 91.723
2011-04-01 93.915
2011-07-01 90.757
2011-10-01 95.924
2012-01-01 97.692
2012-04-01 95.130
2012-07-01 97.877
2012-10-01 106.299
2013-01-01 110.949
2013-04-01 111.350
2013-07-01 115.006
2013-10-01 122.608
2014-01-01 122.382
2014-04-01 123.213
2014-07-01 123.558
2014-10-01 121.884
2015-01-01 128.426
2015-04-01 131.783