Quarterly Millions of US Dollars
1971-01-01 0
1971-04-01 0
1971-07-01 0
1971-10-01 0
1972-01-01 0
1972-04-01 0
1972-07-01 0
1972-10-01 0
1973-01-01 0
1973-04-01 0
1973-07-01 0
1973-10-01 0
1974-01-01 0
1974-04-01 0
1974-07-01 0
1974-10-01 0
1975-01-01 0
1975-04-01 0
1975-07-01 0
1975-10-01 0
1976-01-01 0
1976-04-01 0
1976-07-01 0
1976-10-01 0
1977-01-01 0
1977-04-01 0
1977-07-01 0
1977-10-01 0
1978-01-01 0
1978-04-01 0
1978-07-01 0
1978-10-01 0
1979-01-01 0
1979-04-01 27
1979-07-01 29
1979-10-01 29
1980-01-01 26
1980-04-01 0
1980-07-01 0
1980-10-01 0
1981-01-01 0
1981-04-01 0
1981-07-01 0
1981-10-01 0
1982-01-01 0
1982-04-01 41
1982-07-01 40
1982-10-01 42
1983-01-01 41
1983-04-01 0
1983-07-01 0
1983-10-01 0
1984-01-01 0
1984-04-01 0
1984-07-01 0
1984-10-01 51
1985-01-01 57
1985-04-01 57
1985-07-01 140
1985-10-01 87
1986-01-01 86
1986-04-01 102
1986-07-01 62
1986-10-01 64
1987-01-01 69
1987-04-01 55
1987-07-01 0
1987-10-01 0
1988-01-01 0
1988-04-01 1
1988-07-01 1
1988-10-01 92
1989-01-01 89
1989-04-01 92
1989-07-01 152
1989-10-01 75
1990-01-01 72
1990-04-01 70
1990-07-01 89
1990-10-01 94
1991-01-01 82
1991-04-01 131
1991-07-01 78
1991-10-01 157
1992-01-01 342
1992-04-01 441
1992-07-01 933
1992-10-01 800
1993-01-01 595
1993-04-01 654
1993-07-01 390
1993-10-01 606
1994-01-01 610
1994-04-01 415
1994-07-01 405
1994-10-01 351
1995-01-01 363
1995-04-01 362
1995-07-01 187
1995-10-01 374
1996-01-01 552
1996-04-01 540
1996-07-01 618
1996-10-01 322
1997-01-01 138
1997-04-01 137
1997-07-01 241
1997-10-01 416
1998-01-01 405
1998-04-01 405
1998-07-01 397
1998-10-01 405
1999-01-01 399
1999-04-01 396
1999-07-01 398
1999-10-01 413
2000-01-01 410
2000-04-01 411
2000-07-01 596
2000-10-01 547
2001-01-01 539
2001-04-01 534
2001-07-01 540
2001-10-01 511
2002-01-01 509
2002-04-01 534
2002-07-01 622
2002-10-01 670
2003-01-01 670
2003-04-01 670
2003-07-01 490
2003-10-01 908
2004-01-01 917
2004-04-01 912
2004-07-01 911
2004-10-01 480
2005-01-01 930
2005-04-01 930
2005-07-01 680
2005-10-01 900
2006-01-01 450
2006-04-01 450
2006-07-01 874
2006-10-01 440
2007-01-01 444
2007-04-01 448
2007-07-01 0
2007-10-01 0
2008-01-01 353
2008-04-01 349
2008-07-01 319
2008-10-01 557
2009-01-01 240
2009-04-01 240
2009-07-01 240
2009-10-01 0
2010-01-01 170
2010-04-01 170
2010-07-01 170
2010-10-01 170
2011-01-01 0
2011-04-01 0
2011-07-01 0
2011-10-01 0
2012-01-01 0
2012-04-01 0
2012-07-01 0
2012-10-01 0
2013-01-01 0
2013-04-01 0
2013-07-01 0
2013-10-01 0
2014-01-01 0
2014-04-01 0
2014-07-01 0
2014-10-01 0
2015-01-01 0
2015-04-01 0
2015-07-01 0
2015-10-01 0
2016-01-01 650
2016-04-01 1530
2016-07-01 1530
2016-10-01 1530
2017-01-01 880
2017-04-01 1000
2017-07-01 1000
2017-10-01 1000
2018-01-01 1000
2018-04-01 1000