Quarterly Billions of US Dollars
1987-01-01 0.130
1987-04-01 0.130
1987-07-01 0.130
1987-10-01 0.132
1988-01-01 0.235
1988-04-01 0.239
1988-07-01 0.314
1988-10-01 0.275
1989-01-01 0.303
1989-04-01 0.289
1989-07-01 0.194
1989-10-01 0.201
1990-01-01 0.182
1990-04-01 0.187
1990-07-01 0.166
1990-10-01 0.100
1991-01-01 0.120
1991-04-01 0.263
1991-07-01 0.266
1991-10-01 0.453
1992-01-01 0.422
1992-04-01 0.639
1992-07-01 0.633
1992-10-01 0.550
1993-01-01 0.547
1993-04-01 0.527
1993-07-01 0.733
1993-10-01 0.662
1994-01-01 0.694
1994-04-01 0.736
1994-07-01 0.729
1994-10-01 0.716
1995-01-01 0.774
1995-04-01 0.775
1995-07-01 0.892
1995-10-01 0.957
1996-01-01 0.895
1996-04-01 1.335
1996-07-01 1.164
1996-10-01 1.039
1997-01-01 1.166
1997-04-01 1.156
1997-07-01 1.191
1997-10-01 1.165
1998-01-01 1.428
1998-04-01 1.369
1998-07-01 1.347
1998-10-01 1.210
1999-01-01 2.207
1999-04-01 2.600
1999-07-01 3.561
1999-10-01 4.767
2000-01-01 6.743
2000-04-01 8.911
2000-07-01 10.807
2000-10-01 12.481
2001-01-01 13.901
2001-04-01 16.806
2001-07-01 18.723
2001-10-01 17.786
2002-01-01 20.052
2002-04-01 27.096
2002-07-01 25.824
2002-10-01 27.903
2003-01-01 29.974
2003-04-01 35.513
2003-07-01 36.715
2003-10-01 42.265
2004-01-01 44.760
2004-04-01 46.064
2004-07-01 48.540
2004-10-01 53.459
2005-01-01 52.152
2005-04-01 49.546
2005-07-01 45.341
2005-10-01 52.373
2006-01-01 57.243
2006-04-01 60.931
2006-07-01 62.957
2006-10-01 73.883
2007-01-01 75.453
2007-04-01 88.609
2007-07-01 93.043
2007-10-01 96.913
2008-01-01 105.073
2008-04-01 113.798
2008-07-01 102.898
2008-10-01 90.502
2009-01-01 89.875
2009-04-01 104.451
2009-07-01 115.174
2009-10-01 108.705
2010-01-01 108.880
2010-04-01 87.149
2010-07-01 91.760
2010-10-01 88.610
2011-01-01 89.935
2011-04-01 89.290
2011-07-01 80.222
2011-10-01 77.576
2012-01-01 72.852
2012-04-01 70.213
2012-07-01 67.268
2012-10-01 67.877
2013-01-01 64.218
2013-04-01 59.060
2013-07-01 59.747
2013-10-01 58.461
2014-01-01 57.301
2014-04-01 46.208
2014-07-01 38.933
2014-10-01 34.879
2015-01-01 29.791
2015-04-01 29.370