Quarterly Millions of US Dollars
1976-01-01 0
1976-04-01 0
1976-07-01 0
1976-10-01 0
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 18
1980-04-01 19
1980-07-01 19
1980-10-01 18
1981-01-01 0
1981-04-01 0
1981-07-01 0
1981-10-01 0
1982-01-01 0
1982-04-01 22
1982-07-01 22
1982-10-01 22
1983-01-01 22
1983-04-01 0
1983-07-01 0
1983-10-01 0
1984-01-01 0
1984-04-01 30
1984-07-01 30
1984-10-01 38
1985-01-01 38
1985-04-01 8
1985-07-01 8
1985-10-01 8
1986-01-01 8
1986-04-01 17
1986-07-01 17
1986-10-01 9
1987-01-01 9
1996-04-01 139
1996-07-01 139
1996-10-01 8
1997-01-01 8
1997-04-01 8
1997-07-01 8
1997-10-01 8
1998-01-01 8
1998-04-01 8
1998-07-01 8
1998-10-01 8
1999-01-01 8
1999-04-01 8
1999-07-01 8
1999-10-01 8
2000-01-01 8
2000-04-01 8
2000-07-01 333
2000-10-01 333
2001-01-01 333
2001-04-01 333
2001-07-01 8
2001-10-01 18
2002-01-01 18
2002-04-01 8
2002-07-01 8
2002-10-01 8
2003-01-01 17
2003-04-01 251
2003-07-01 256
2003-10-01 274
2004-01-01 258
2004-04-01 616
2004-07-01 629
2004-10-01 689
2005-01-01 656
2005-04-01 8
2005-07-01 8
2005-10-01 12
2006-01-01 28
2006-04-01 25
2006-07-01 25
2006-10-01 18
2007-01-01 0
2007-04-01 0
2007-07-01 0
2007-10-01 0
2008-01-01 632
2008-04-01 631
2008-07-01 572
2008-10-01 668
2009-01-01 772
2009-04-01 820
2009-07-01 849
2009-10-01 720
2010-01-01 0
2010-04-01 552
2010-07-01 614
2010-10-01 601
2011-01-01 639
2011-04-01 0
2011-07-01 2701
2011-10-01 2588
2012-01-01 2671
2012-04-01 2518
2012-07-01 114
2012-10-01 116
2013-01-01 113
2013-04-01 115
2013-07-01 0
2013-10-01 69
2014-01-01 69
2014-04-01 1844
2014-07-01 1699
2014-10-01 1578
2015-01-01 1614
2015-04-01 224
2015-07-01 224
2015-10-01 544
2016-01-01 342
2016-04-01 333
2016-07-01 1004
2016-10-01 1687
2017-01-01 2780
2017-04-01 3967
2017-07-01 3715
2017-10-01 2559
2018-01-01 4102
2018-04-01 3324