Quarterly Millions of US Dollars
1975-01-01 0
1975-04-01 0
1975-07-01 0
1975-10-01 0
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 0
1980-04-01 0
1980-07-01 0
1980-10-01 0
1981-01-01 0
1981-04-01 0
1981-07-01 0
1981-10-01 0
1982-01-01 60
1982-04-01 100
1982-07-01 100
1982-10-01 100
1983-01-01 40
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 0
1998-01-01 0
1998-04-01 599
1998-07-01 609
1998-10-01 682
1999-01-01 748
1999-04-01 86
1999-07-01 88
1999-10-01 88
2000-01-01 50
2000-04-01 50
2000-07-01 50
2000-10-01 311
2001-01-01 239
2001-04-01 502
2001-07-01 531
2001-10-01 270
2002-01-01 268
2002-04-01 0
2002-07-01 0
2002-10-01 157
2003-01-01 163
2003-04-01 343
2003-07-01 350
2003-10-01 235
2004-01-01 229
2004-04-01 91
2004-07-01 91
2004-10-01 500
2005-01-01 480
2005-04-01 454
2005-07-01 453
2005-10-01 239
2006-01-01 243
2006-04-01 250
2006-07-01 250
2006-10-01 249
2007-01-01 251
2007-04-01 1018
2007-07-01 1067
2007-10-01 883
2008-01-01 949
2008-04-01 0
2008-07-01 0
2008-10-01 0
2009-01-01 0
2009-04-01 0
2009-07-01 1025
2009-10-01 1008
2010-01-01 944
2010-04-01 859
2010-07-01 0
2010-10-01 0
2011-01-01 0
2011-04-01 1012
2011-07-01 945
2011-10-01 906
2012-01-01 935
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 1379
2014-04-01 2049
2014-07-01 1887
2014-10-01 1821
2015-01-01 538
2015-04-01 1678
2015-07-01 1680
2015-10-01 1633
2016-01-01 1708
2016-04-01 0
2016-07-01 0
2016-10-01 0
2017-01-01 0
2017-04-01 1712
2017-07-01 1771
2017-10-01 1799
2018-01-01 1848
2018-04-01 0