Date
- 1980-05-01T07:00:00Z1
- 1980-10-01T07:00:00Z1
- 1981-04-01T08:00:00Z1
- 1981-05-01T07:00:00Z1
- 1981-10-01T07:00:00Z1
- 1982-04-01T08:00:00Z1
- 1982-05-01T07:00:00Z1
- 1982-10-01T07:00:00Z1
- 1983-04-01T08:00:00Z1
- 1983-05-01T07:00:00Z1
- 1983-10-01T07:00:00Z1
- 1984-04-01T08:00:00Z1
- 1984-05-01T07:00:00Z1
- 1984-10-01T07:00:00Z1
- 1985-04-01T08:00:00Z1
- 1985-05-01T07:00:00Z1
- 1985-10-01T07:00:00Z1
- 1986-04-01T08:00:00Z1
- 1986-05-01T07:00:00Z1
- 1986-10-01T07:00:00Z1