Quarter	Millions of US Dollars
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	0
1982-04-01	0
1982-07-01	25
1982-10-01	25
1983-01-01	25
1983-04-01	25
1983-07-01	0
1983-10-01	0
1984-01-01	0
1984-04-01	0
1984-07-01	0
1984-10-01	0
1985-01-01	0
1985-04-01	0
1985-07-01	34
1985-10-01	35
1986-01-01	34
1986-04-01	34
1986-07-01	40
1986-10-01	40
1987-01-01	40
1987-04-01	40
1987-07-01	0
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	50
1991-10-01	50
1992-01-01	50
1992-04-01	50
2002-01-01	0
2002-04-01	0
2002-07-01	0
2002-10-01	0
2003-01-01	0
2003-04-01	0
2003-07-01	0
2003-10-01	0
2004-01-01	450
2004-04-01	450
2004-07-01	450
2004-10-01	450
2005-01-01	0
2005-04-01	0
2005-07-01	689
2005-10-01	743
2006-01-01	1270
2006-04-01	607
2006-07-01	479
2006-10-01	608
2007-01-01	601
2007-04-01	716
2007-07-01	231
2007-10-01	623
2008-01-01	707
2008-04-01	667
2008-07-01	618
2008-10-01	525
2009-01-01	500
2009-04-01	1000
2009-07-01	1000
2009-10-01	500
2010-01-01	519
2010-04-01	860
2010-07-01	915
2010-10-01	1004
2011-01-01	1018
2011-04-01	200
2011-07-01	975
2011-10-01	875
2012-01-01	1071
2012-04-01	1052
2012-07-01	353
2012-10-01	296
2013-01-01	100
2013-04-01	100
2013-07-01	33
2013-10-01	34
2014-01-01	34
2014-04-01	34
2014-07-01	0
2014-10-01	703
2015-01-01	870
2015-04-01	881
2015-07-01	1015
2015-10-01	1263
2016-01-01	1144
2016-04-01	1138
2016-07-01	950
2016-10-01	500
2017-01-01	500
2017-04-01	643
2017-07-01	520
2017-10-01	95
2018-01-01	383
2018-04-01	1514