Quarterly Millions of US Dollars
1972-01-01 20
1972-04-01 52
1972-10-01 20
1974-07-01 9
1976-10-01 48
1977-01-01 62
1977-07-01 25
1977-10-01 62
1978-01-01 91
1978-07-01 70
1978-10-01 22
1979-01-01 61
1980-04-01 -20
1980-07-01 25
1982-01-01 -14
1982-04-01 -42
1982-07-01 -25
1983-01-01 -51
1984-01-01 -20
1985-01-01 19
1985-10-01 -69
1986-01-01 -4
1986-07-01 26
1986-10-01 -87
1987-01-01 -3
1987-07-01 -26
1987-10-01 -2
1988-01-01 -92
1988-04-01 40
1988-10-01 -80
1989-01-01 -25
1990-01-01 -34
1990-07-01 -24
1991-04-01 87
1991-07-01 -32
1993-01-01 -41
1994-01-01 -112
1994-04-01 14
1994-07-01 5
1994-10-01 35
1995-04-01 -10
1995-07-01 300
1995-10-01 205
1996-01-01 1940
1996-04-01 -1839
1996-07-01 3222
1997-01-01 500
1997-04-01 134
1997-07-01 800
1997-10-01 400
1998-04-01 1263
1998-07-01 350
1998-10-01 -513
1999-01-01 1036
1999-04-01 0
1999-10-01 633
2000-04-01 574
2000-07-01 622
2000-10-01 629
2001-01-01 719
2001-04-01 905
2001-07-01 1057
2001-10-01 46
2002-01-01 653
2002-04-01 733
2002-07-01 791
2002-10-01 3349
2003-01-01 1368
2003-04-01 610
2003-07-01 -323
2003-10-01 -7
2004-01-01 -708
2004-04-01 1261
2004-07-01 3332
2004-10-01 2732
2005-01-01 -1118
2005-04-01 128
2005-07-01 11
2005-10-01 1836
2006-01-01 2254
2006-04-01 2329
2006-07-01 -467
2006-10-01 -124
2007-01-01 -250
2007-04-01 453
2007-07-01 338
2007-10-01 -123
2008-01-01 -144
2008-04-01 -134
2008-07-01 -193
2009-01-01 1972
2009-04-01 444
2009-07-01 -352
2009-10-01 -402
2010-01-01 1385
2010-04-01 650
2010-07-01 700
2010-10-01 1020
2011-01-01 609
2011-04-01 0
2011-07-01 1150
2011-10-01 3766
2012-01-01 -750
2012-04-01 3485
2012-07-01 1148
2012-10-01 3961
2013-01-01 -1225
2013-04-01 3299
2013-07-01 2368
2013-10-01 500
2014-01-01 300
2014-04-01 -252
2014-07-01 3000
2015-01-01 1729
2015-04-01 -250
2015-07-01 -500
2015-10-01 3550
2016-01-01 1282
2016-04-01 2000
2016-10-01 2795
2017-01-01 3700
2017-04-01 1422
2017-07-01 5350
2017-10-01 -2950
2018-01-01 300
2018-04-01 6762