Quarterly Billions of US Dollars
1987-01-01 0.013
1987-04-01 0.013
1987-07-01 0.039
1987-10-01 0.046
1988-01-01 0.074
1988-04-01 0.067
1988-07-01 0.065
1988-10-01 0.068
1989-01-01 0.064
1989-04-01 0.057
1989-07-01 0.060
1989-10-01 0.136
1990-01-01 0.249
1990-04-01 0.253
1990-07-01 0.484
1990-10-01 0.644
1991-01-01 0.618
1991-04-01 0.833
1991-07-01 0.908
1991-10-01 1.010
1992-01-01 1.199
1992-04-01 1.260
1992-07-01 1.388
1992-10-01 1.731
1993-01-01 1.729
1993-04-01 1.713
1993-07-01 2.595
1993-10-01 2.752
1994-01-01 2.707
1994-04-01 2.823
1994-07-01 3.125
1994-10-01 3.280
1995-01-01 3.604
1995-04-01 4.008
1995-07-01 4.445
1995-10-01 6.694
1996-01-01 9.121
1996-04-01 10.258
1996-07-01 10.646
1996-10-01 11.947
1997-01-01 13.730
1997-04-01 16.069
1997-07-01 17.557
1997-10-01 18.928
1998-01-01 20.842
1998-04-01 22.188
1998-07-01 25.850
1998-10-01 24.656
1999-01-01 25.980
1999-04-01 27.564
1999-07-01 30.325
1999-10-01 32.803
2000-01-01 31.532
2000-04-01 34.255
2000-07-01 34.094
2000-10-01 34.510
2001-01-01 36.774
2001-04-01 39.911
2001-07-01 41.037
2001-10-01 43.819
2002-01-01 45.210
2002-04-01 52.140
2002-07-01 56.197
2002-10-01 66.084
2003-01-01 71.100
2003-04-01 77.865
2003-07-01 88.168
2003-10-01 120.732
2004-01-01 126.936
2004-04-01 136.627
2004-07-01 156.833
2004-10-01 206.259
2005-01-01 215.304
2005-04-01 232.030
2005-07-01 239.991
2005-10-01 273.247
2006-01-01 310.901
2006-04-01 370.325
2006-07-01 433.049
2006-10-01 506.128
2007-01-01 564.946
2007-04-01 653.311
2007-07-01 721.157
2007-10-01 775.766
2008-01-01 834.336
2008-04-01 878.415
2008-07-01 822.159
2008-10-01 850.203
2009-01-01 863.475
2009-04-01 936.149
2009-07-01 991.689
2009-10-01 973.128
2010-01-01 905.692
2010-04-01 848.477
2010-07-01 927.081
2010-10-01 913.739
2011-01-01 892.297
2011-04-01 889.464
2011-07-01 832.488
2011-10-01 809.646
2012-01-01 870.165
2012-04-01 822.702
2012-07-01 834.277
2012-10-01 846.867
2013-01-01 818.418
2013-04-01 820.856
2013-07-01 838.027
2013-10-01 850.176
2014-01-01 812.581
2014-04-01 805.973
2014-07-01 740.910
2014-10-01 677.738
2015-01-01 595.687
2015-04-01 645.720