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
2006-04-01 607
2006-07-01 612
2006-10-01 617
2007-01-01 625
2007-04-01 1018
2007-07-01 1067
2007-10-01 1383
2008-01-01 1449
2008-04-01 500
2008-07-01 500
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
2010-10-01 230
2011-01-01 253
2011-04-01 1262
2011-07-01 1173
2011-10-01 912
2012-01-01 941
2012-04-01 15
2012-07-01 19
2012-10-01 232
2013-01-01 313
2013-04-01 340
2013-07-01 349
2013-10-01 153
2014-01-01 1502
2014-04-01 2142
2014-07-01 1975
2014-10-01 1887
2015-01-01 561
2015-04-01 1699
2015-07-01 1714
2015-10-01 1665
2016-01-01 1729
2016-04-01 21
2016-07-01 8
2016-10-01 8
2017-01-01 0
2017-04-01 1717
2017-07-01 1791
2017-10-01 1831
2018-01-01 1907
2018-04-01 56