Date
- 1976-05-01T07:00:00Z1
- 1976-08-07T07:00:00Z1
- 1976-12-16T08:00:00Z1
- 1977-05-01T07:00:00Z1
- 1977-08-06T07:00:00Z1
- 1977-12-22T08:00:00Z1
- 1978-05-01T07:00:00Z1
- 1978-08-12T07:00:00Z1
- 1978-12-21T08:00:00Z1
- 1979-05-01T07:00:00Z1
- 1979-08-11T07:00:00Z1
- 1979-12-20T08:00:00Z1
- 1980-05-01T07:00:00Z1
- 1980-08-09T07:00:00Z1
- 1980-12-18T08:00:00Z1
- 1981-05-01T07:00:00Z1
- 1981-08-08T07:00:00Z1
- 1981-12-17T08:00:00Z1
- 1982-05-01T07:00:00Z1
- 1982-08-07T07:00:00Z1