Quarterly Millions of US Dollars
1987-10-01 0
1988-01-01 0
1988-04-01 0
1988-07-01 0
1988-10-01 0
1989-01-01 0
1989-04-01 0
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
1991-10-01 198
1992-01-01 183
1992-04-01 196
1992-07-01 213
1993-07-01 0
1993-10-01 0
1994-01-01 0
1994-04-01 0
1994-07-01 0
1994-10-01 0
1995-01-01 0
1995-04-01 0
1995-07-01 0
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
1997-07-01 248
1997-10-01 231
1998-01-01 226
1998-04-01 216
1998-07-01 222
1998-10-01 264
1999-01-01 252
1999-04-01 248
1999-07-01 0
1999-10-01 0
2000-01-01 0
2000-04-01 0
2000-07-01 700
2000-10-01 700
2001-01-01 700
2001-04-01 917
2001-07-01 233
2001-10-01 855
2002-01-01 1150
2002-04-01 953
2002-07-01 947
2002-10-01 600
2003-01-01 1300
2003-04-01 1300
2003-07-01 1571
2003-10-01 1281
2004-01-01 289
2004-04-01 275
2004-07-01 271
2004-10-01 293
2005-01-01 281
2005-04-01 936
2005-07-01 962
2005-10-01 949
2006-01-01 966
2006-04-01 300
2006-07-01 0
2006-10-01 0
2007-01-01 0
2007-04-01 0
2007-07-01 0
2007-10-01 1589
2008-01-01 1632
2008-04-01 1631
2008-07-01 1572
2008-10-01 500
2009-01-01 500
2009-04-01 500
2009-07-01 500
2009-10-01 0
2010-01-01 0
2010-04-01 1000
2010-07-01 1000
2010-10-01 1000
2011-01-01 1000
2011-04-01 0
2011-07-01 0
2011-10-01 476
2012-01-01 476
2012-04-01 472
2012-07-01 1273
2012-10-01 2123
2013-01-01 2126
2013-04-01 3037
2013-07-01 4105
2013-10-01 4187
2014-01-01 4112
2014-04-01 5654
2014-07-01 3718
2014-10-01 3238
2015-01-01 3242
2015-04-01 807
2015-07-01 2360
2015-10-01 3546
2016-01-01 3562
2016-04-01 6473
2016-07-01 4946
2016-10-01 3744
2017-01-01 3775
2017-04-01 885
2017-07-01 1654
2017-10-01 1690
2018-01-01 1750
2018-04-01 3112