Quarterly Millions of US Dollars
1985-01-01 20
1985-04-01 20
1985-07-01 23
1985-10-01 25
1986-01-01 28
1986-04-01 31
1986-07-01 60
1986-10-01 58
1987-01-01 64
1987-04-01 63
1987-07-01 64
1987-10-01 77
1988-01-01 75
1988-04-01 107
1988-07-01 106
1988-10-01 114
1989-01-01 108
1989-04-01 99
1989-07-01 103
1989-10-01 100
1990-01-01 59
1990-04-01 61
1990-07-01 67
1990-10-01 69
1991-01-01 66
1991-04-01 67
1991-07-01 38
1991-10-01 40
1992-01-01 38
1992-04-01 40
1992-07-01 42
1992-10-01 40
1993-01-01 43
1993-04-01 47
1993-07-01 47
1993-10-01 45
1994-01-01 49
1994-04-01 64
1994-07-01 64
1994-10-01 94
1995-01-01 101
1995-04-01 102
1995-07-01 94
1995-10-01 216
1996-01-01 412
1996-04-01 291
1996-07-01 307
1996-10-01 222
1997-01-01 94
1997-04-01 227
1997-07-01 115
1997-10-01 68
1998-01-01 68
1998-04-01 30
1998-07-01 30
1998-10-01 30
1999-01-01 30
1999-04-01 30
1999-07-01 30
2000-04-01 100
2000-07-01 100
2000-10-01 100
2001-01-01 100
2001-04-01 100
2001-07-01 100
2001-10-01 250
2002-01-01 250
2002-04-01 250
2002-07-01 250
2002-10-01 250
2003-01-01 250
2003-04-01 250
2003-07-01 250
2003-10-01 250
2004-01-01 250
2004-04-01 250
2004-07-01 250
2004-10-01 250
2005-01-01 450
2005-04-01 450
2005-07-01 450
2005-10-01 575
2006-01-01 575
2006-04-01 725
2006-07-01 725
2006-10-01 790
2007-01-01 790
2007-04-01 790
2007-07-01 790
2007-10-01 790
2008-01-01 1113
2008-04-01 1113
2008-07-01 1113
2008-10-01 1113
2009-01-01 1113
2009-04-01 1113
2009-07-01 1113
2009-10-01 1563
2010-01-01 1201
2010-04-01 1291
2010-07-01 1491
2010-10-01 1491
2011-01-01 1491
2011-04-01 1491
2011-07-01 1330
2011-10-01 1330
2012-01-01 1330
2012-04-01 1330
2012-07-01 1330
2012-10-01 1330
2013-01-01 1330
2013-04-01 1330
2013-07-01 1330
2013-10-01 1330
2014-01-01 1330
2014-04-01 880
2014-07-01 880
2014-10-01 690
2015-01-01 690
2015-04-01 690
2015-07-01 1010
2015-10-01 1010
2016-01-01 1010
2016-04-01 860
2016-07-01 860
2016-10-01 860
2017-01-01 860
2017-04-01 860
2017-07-01 860
2017-10-01 860
2018-01-01 860
2018-04-01 860