Quarterly Millions of US Dollars
1987-07-01 0
1987-10-01 0
1988-01-01 0
1988-04-01 0
1988-07-01 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
1993-10-01 73
1994-01-01 221
1994-04-01 560
1994-07-01 405
1994-10-01 717
1995-01-01 298
1995-04-01 350
1995-07-01 589
1995-10-01 691
1996-01-01 757
1996-04-01 643
1996-07-01 234
1996-10-01 480
1997-01-01 372
1997-04-01 461
1997-07-01 521
1997-10-01 383
1998-01-01 411
1998-04-01 422
1998-07-01 374
1998-10-01 268
1999-01-01 186
1999-04-01 141
1999-07-01 124
1999-10-01 142
2000-01-01 118
2000-04-01 140
2000-07-01 156
2000-10-01 133
2001-01-01 161
2001-04-01 215
2001-07-01 226
2001-10-01 201
2002-01-01 129
2002-04-01 57
2002-07-01 41
2002-10-01 48
2003-01-01 50
2003-04-01 50
2003-07-01 59
2003-10-01 83
2004-01-01 72
2004-04-01 86
2004-07-01 63
2004-10-01 51
2005-01-01 37
2005-04-01 79
2005-07-01 79
2005-10-01 63
2006-01-01 56
2006-04-01 23
2006-07-01 27
2006-10-01 23
2007-01-01 21
2007-04-01 12
2007-07-01 15
2007-10-01 17
2008-01-01 16
2008-04-01 10
2008-07-01 9
2008-10-01 12
2009-01-01 9
2009-04-01 10
2009-07-01 8
2009-10-01 5
2010-01-01 1
2010-04-01 0
2010-07-01 200
2010-10-01 200
2011-01-01 200
2011-04-01 200
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 0
2016-04-01 0
2016-07-01 0
2016-10-01 650
2017-01-01 650
2017-04-01 662
2017-07-01 662
2017-10-01 12
2018-01-01 13
2018-04-01 0