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
1992-04-01 100
1992-07-01 100
1992-10-01 100
1993-01-01 147
1993-04-01 49
1993-07-01 147
1993-10-01 143
1994-01-01 349
1994-04-01 363
1994-07-01 738
1994-10-01 737
1995-01-01 464
1995-04-01 464
1995-07-01 1035
1995-10-01 1061
1996-01-01 998
1996-04-01 1017
1996-07-01 0
1996-10-01 25
1997-01-01 94
1997-04-01 129
1997-07-01 129
1997-10-01 469
1998-01-01 47
1998-04-01 247
1998-07-01 201
1998-10-01 320
1999-01-01 320
1999-04-01 501
1999-07-01 850
1999-10-01 631
2000-01-01 781
2000-04-01 1003
2000-07-01 611
2000-10-01 1640
2001-01-01 1465
2001-04-01 1300
2001-07-01 1300
2001-10-01 400
2002-01-01 560
2002-04-01 1746
2002-07-01 1742
2002-10-01 1666
2003-01-01 2786
2003-04-01 1169
2003-07-01 1192
2003-10-01 1939
2004-01-01 1414
2004-04-01 1687
2004-07-01 4979
2004-10-01 4717
2005-01-01 4280
2005-04-01 4842
2005-07-01 2007
2005-10-01 2847
2006-01-01 3311
2006-04-01 6329
2006-07-01 6780
2006-10-01 6447
2007-01-01 6216
2007-04-01 2901
2007-07-01 2789
2007-10-01 2259
2008-01-01 2987
2008-04-01 3467
2008-07-01 5039
2008-10-01 6644
2009-01-01 8908
2009-04-01 10181
2009-07-01 9511
2009-10-01 8177
2010-01-01 5635
2010-04-01 4893
2010-07-01 6652
2010-10-01 8560
2011-01-01 8817
2011-04-01 10204
2011-07-01 7765
2011-10-01 5756
2012-01-01 7228
2012-04-01 6187
2012-07-01 8547
2012-10-01 9507
2013-01-01 20847
2013-04-01 19692
2013-07-01 17301
2013-10-01 16318
2014-01-01 2912
2014-04-01 4786
2014-07-01 7199
2014-10-01 8598
2015-01-01 9914
2015-04-01 9186
2015-07-01 7401
2015-10-01 6864
2016-01-01 8272
2016-04-01 14620
2016-07-01 15015
2016-10-01 16000
2017-01-01 18013
2017-04-01 15167
2017-07-01 21053
2017-10-01 21838
2018-01-01 18881
2018-04-01 18969