Quarter	Millions of US Dollars
1972-10-01	10
1973-01-01	24
1973-04-01	24
1973-07-01	24
1973-10-01	24
1974-01-01	24
1974-04-01	24
1974-07-01	24
1974-10-01	24
1975-01-01	24
1975-04-01	24
1975-07-01	24
1975-10-01	24
1976-01-01	24
1976-04-01	24
1976-07-01	24
1976-10-01	24
1977-01-01	24
1977-04-01	24
1977-07-01	24
1977-10-01	24
1978-01-01	24
1978-04-01	24
1978-07-01	24
1978-10-01	24
1979-01-01	24
1979-04-01	24
1979-07-01	24
1979-10-01	14
1980-01-01	14
1980-04-01	14
1980-07-01	14
1980-10-01	14
1981-01-01	14
1981-04-01	14
1981-07-01	14
1981-10-01	14
1982-01-01	14
1982-04-01	14
1982-07-01	14
1982-10-01	14
1983-01-01	14
1983-04-01	14
1983-07-01	14
1983-10-01	14
1984-01-01	14
1984-04-01	14
1984-07-01	14
1984-10-01	14
1985-01-01	14
1985-04-01	14
1985-07-01	14
1985-10-01	14
1986-01-01	14
1986-04-01	14
1986-07-01	14
1986-10-01	14
1987-01-01	14
1987-04-01	14
1987-07-01	14
1987-10-01	14
1996-10-01	75
1997-01-01	75
1997-04-01	75
1997-07-01	275
1997-10-01	270
1998-01-01	270
1998-04-01	520
1998-07-01	520
1998-10-01	520
1999-01-01	520
1999-04-01	520
1999-07-01	520
1999-10-01	450
2000-01-01	641
2000-04-01	641
2000-07-01	850
2000-10-01	861
2001-01-01	1006
2001-04-01	1393
2001-07-01	1417
2001-10-01	1655
2002-01-01	1652
2002-04-01	1999
2002-07-01	1795
2002-10-01	1818
2003-01-01	1616
2003-04-01	1625
2003-07-01	1629
2003-10-01	1646
2004-01-01	1883
2004-04-01	2006
2004-07-01	2046
2004-10-01	2299
2005-01-01	2263
2005-04-01	2265
2005-07-01	2762
2005-10-01	2999
2006-01-01	3366
2006-04-01	3399
2006-07-01	3726
2006-10-01	3954
2007-01-01	5712
2007-04-01	5848
2007-07-01	5660
2007-10-01	5840
2008-01-01	5900
2008-04-01	6247
2008-07-01	6167
2008-10-01	6145
2009-01-01	6166
2009-04-01	6195
2009-07-01	6359
2009-10-01	6851
2010-01-01	7579
2010-04-01	7537
2010-07-01	7571
2010-10-01	7861
2011-01-01	8276
2011-04-01	7884
2011-07-01	7837
2011-10-01	8391
2012-01-01	8656
2012-04-01	8629
2012-07-01	9418
2012-10-01	8022
2013-01-01	9216
2013-04-01	9220
2013-07-01	9198
2013-10-01	9702
2014-01-01	9688
2014-04-01	9416
2014-07-01	10186
2014-10-01	9997
2015-01-01	10922
2015-04-01	9822
2015-07-01	11793
2015-10-01	11793
2016-01-01	11793
2016-04-01	11793
2016-07-01	12357
2016-10-01	12357
2017-01-01	12357
2017-04-01	11682
2017-07-01	12551
2017-10-01	12551
2018-01-01	12551
2018-04-01	12551