Quarterly Millions of US Dollars
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 0
1979-07-01 0
1979-10-01 0
1980-01-01 0
1980-04-01 0
1980-07-01 0
1980-10-01 0
1981-01-01 48
1981-04-01 42
1981-07-01 43
1981-10-01 44
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 0
1992-07-01 0
1992-10-01 0
1993-01-01 0
1993-04-01 0
1993-07-01 0
1993-10-01 0
1994-01-01 0
1994-04-01 0
1994-07-01 0
1994-10-01 78
1995-01-01 73
1995-04-01 71
1995-07-01 76
1995-10-01 0
1996-01-01 0
1996-04-01 0
1996-07-01 0
1996-10-01 0
1997-01-01 0
1997-04-01 0
1997-07-01 0
1997-10-01 138
1998-01-01 138
1998-04-01 388
1998-07-01 392
1998-10-01 248
1999-01-01 261
1999-04-01 20
1999-07-01 170
1999-10-01 170
2000-01-01 150
2000-04-01 150
2000-07-01 0
2000-10-01 0
2001-01-01 0
2001-04-01 75
2001-07-01 0
2001-10-01 0
2002-01-01 0
2002-04-01 0
2002-07-01 0
2002-10-01 0
2003-01-01 0
2003-04-01 18
2003-07-01 18
2003-10-01 18
2004-01-01 18
2004-04-01 0
2004-07-01 503
2004-10-01 605
2005-01-01 503
2005-04-01 900
2005-07-01 504
2005-10-01 1052
2006-01-01 1925
2006-04-01 2078
2006-07-01 3900
2006-10-01 5222
2007-01-01 10613
2007-04-01 10498
2007-07-01 9895
2007-10-01 9006
2008-01-01 7624
2008-04-01 7568
2008-07-01 7793
2008-10-01 9582
2009-01-01 9125
2009-04-01 11505
2009-07-01 12739
2009-10-01 9295
2010-01-01 8870
2010-04-01 9377
2010-07-01 11195
2010-10-01 10600
2011-01-01 13054
2011-04-01 13548
2011-07-01 11975
2011-10-01 14407
2012-01-01 13053
2012-04-01 13526
2012-07-01 15048
2012-10-01 12965
2013-01-01 13967
2013-04-01 17239
2013-07-01 21675
2013-10-01 25610
2014-01-01 25466
2014-04-01 20461
2014-07-01 15791
2014-10-01 13478
2015-01-01 12463
2015-04-01 18031
2015-07-01 21487
2015-10-01 22528
2016-01-01 30104
2016-04-01 27054
2016-07-01 28861
2016-10-01 27998
2017-01-01 25214
2017-04-01 24952
2017-07-01 21430
2017-10-01 19843
2018-01-01 16690
2018-04-01 21174