Quarterly Millions of US Dollars
1986-04-01 0
1986-07-01 0
1986-10-01 0
1987-01-01 0
1987-04-01 0
1987-07-01 0
1987-10-01 0
1988-01-01 0
1988-04-01 0
1988-07-01 0
1988-10-01 0
1989-01-01 0
1989-04-01 0
1989-07-01 0
1989-10-01 0
1990-01-01 0
1990-04-01 0
1990-07-01 0
1990-10-01 0
1991-01-01 0
1991-04-01 0
1991-07-01 0
1991-10-01 0
1992-01-01 0
1992-04-01 0
1992-07-01 0
1992-10-01 0
1993-01-01 0
1993-04-01 0
1993-07-01 0
1993-10-01 0
1994-01-01 0
1994-04-01 494
1994-07-01 659
1994-10-01 1198
1995-01-01 1288
1995-04-01 1413
1995-07-01 1683
1995-10-01 1798
1996-01-01 2253
1996-04-01 1820
1996-07-01 1581
1996-10-01 1367
1997-01-01 840
1997-04-01 943
1997-07-01 1983
1997-10-01 4424
1998-01-01 3973
1998-04-01 4966
1998-07-01 4542
1998-10-01 2222
1999-01-01 3786
1999-04-01 2657
1999-07-01 2802
1999-10-01 3778
2000-01-01 2905
2000-04-01 4135
2000-07-01 3608
2000-10-01 5177
2001-01-01 4821
2001-04-01 6562
2001-07-01 6739
2001-10-01 7606
2002-01-01 7448
2002-04-01 8459
2002-07-01 9051
2002-10-01 7518
2003-01-01 9804
2003-04-01 6663
2003-07-01 7443
2003-10-01 7797
2004-01-01 7615
2004-04-01 7679
2004-07-01 10724
2004-10-01 11853
2005-01-01 8452
2005-04-01 9313
2005-07-01 6457
2005-10-01 7109
2006-01-01 6921
2006-04-01 8526
2006-07-01 8377
2006-10-01 6425
2007-01-01 10023
2007-04-01 7633
2007-07-01 6694
2007-10-01 7312
2008-01-01 7487
2008-04-01 9225
2008-07-01 11269
2008-10-01 10743
2009-01-01 9479
2009-04-01 8688
2009-07-01 9435
2009-10-01 10382
2010-01-01 11038
2010-04-01 10656
2010-07-01 8815
2010-10-01 9980
2011-01-01 8401
2011-04-01 8694
2011-07-01 11586
2011-10-01 11340
2012-01-01 20352
2012-04-01 18517
2012-07-01 15536
2012-10-01 12231
2013-01-01 23511
2013-04-01 28164
2013-07-01 31939
2013-10-01 34502
2014-01-01 20178
2014-04-01 18481
2014-07-01 16601
2014-10-01 34394
2015-01-01 32395
2015-04-01 30717
2015-07-01 33529
2015-10-01 13822
2016-01-01 14478
2016-04-01 16875
2016-07-01 16343
2016-10-01 16020
2017-01-01 16771
2017-04-01 23866
2017-07-01 24829
2017-10-01 27736
2018-01-01 30455
2018-04-01 21886