Quarterly Billions of US Dollars
1987-01-01 0.14700
1987-04-01 0.14400
1987-07-01 0.14800
1987-10-01 0.11100
1988-01-01 0.20000
1988-04-01 0.21200
1988-07-01 0.12700
1988-10-01 0.19100
1989-01-01 0.22200
1989-04-01 0.16700
1989-07-01 0.17400
1989-10-01 0.18800
1990-01-01 0.18700
1990-04-01 0.10100
1990-07-01 0.02500
1990-10-01 0.00400
1991-01-01 0.00500
1991-04-01 0.06900
1991-07-01 0.11000
1991-10-01 0.13900
1992-01-01 0.13400
1992-04-01 0.12900
1992-07-01 0.14900
1992-10-01 0.15500
1993-01-01 0.13800
1993-04-01 0.13800
1993-07-01 0.15494
1993-10-01 0.16738
1994-01-01 0.22605
1994-04-01 0.19155
1994-07-01 0.25000
1994-10-01 0.25400
1995-01-01 0.25178
1995-04-01 0.25978
1995-07-01 0.25162
1995-10-01 0.34962
1996-01-01 0.35751
1996-04-01 0.34751
1996-07-01 0.35540
1996-10-01 0.36750
1997-01-01 0.35840
1997-04-01 0.34390
1997-07-01 0.32338
1997-10-01 0.16970
1998-01-01 0.22350
1998-04-01 0.27000
1998-07-01 0.25702
1998-10-01 0.07352
1999-01-01 0.06068
1999-04-01 0.27068
1999-07-01 0.25435
1999-10-01 0.15185
2000-01-01 0.17401
2000-04-01 0.14501
2000-07-01 0.13567
2000-10-01 0.13051
2001-01-01 0.16584
2001-04-01 0.09884
2005-07-01 0.79614
2005-10-01 1.39807
2006-01-01 2.40430
2006-04-01 1.97203
2006-07-01 3.13810
2006-10-01 5.03110
2007-01-01 6.18160
2007-04-01 6.28405
2007-07-01 5.69515
2007-10-01 3.73762
2008-01-01 5.28986
2008-04-01 4.70439
2008-07-01 4.87429
2008-10-01 1.30990
2009-01-01 1.17716
2009-04-01 1.16468
2009-07-01 1.32298
2009-10-01 1.17951
2010-01-01 0.57584
2010-04-01 0.34251
2010-07-01 0.39906
2010-10-01 0.22482
2011-01-01 0.43821
2011-04-01 0.42115
2011-07-01 0.90007
2011-10-01 0.75168
2012-01-01 2.05561
2012-04-01 2.74933
2012-07-01 2.86570
2012-10-01 3.36215
2013-01-01 4.02563
2013-04-01 4.97785
2013-07-01 5.76034
2013-10-01 6.36544
2014-01-01 5.52830
2014-04-01 6.63477
2014-07-01 6.86057
2014-10-01 6.97717
2015-01-01 6.95685
2015-04-01 7.46262