Quarter	Millions of US Dollars
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
1974-10-01	0
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	25
1979-01-01	25
1979-04-01	25
1979-07-01	25
1993-07-01	152
1993-10-01	164
1994-01-01	223
1994-04-01	188
1994-07-01	240
1994-10-01	234
1995-01-01	229
1995-04-01	245
1995-07-01	245
1995-10-01	245
1996-01-01	245
1996-04-01	245
1996-07-01	5
1996-10-01	250
1997-01-01	250
1997-04-01	216
1997-07-01	216
1997-10-01	138
1998-01-01	194
1998-04-01	245
1998-07-01	250
1998-10-01	72
1999-01-01	59
1999-04-01	269
1999-07-01	245
1999-10-01	148
2000-01-01	170
2000-04-01	141
2000-07-01	135
2000-10-01	130
2001-01-01	390
2001-04-01	324
2001-07-01	225
2001-10-01	225
2015-10-01	0
2016-01-01	0
2016-04-01	0
2016-07-01	0
2016-10-01	0
2017-01-01	0
2017-04-01	0
2017-07-01	0
2017-10-01	0
2018-01-01	0
2018-04-01	0