Date
- 1972-04-01T08:00:00Z1
- 1973-04-01T08:00:00Z1
- 1974-04-01T07:00:00Z1
- 1975-01-01T08:00:00Z1
- 1975-02 - 1975-031
- 1975-04-01T07:00:00Z1
- 1976-04-01T08:00:00Z1
- 1977-041
- 1977-04-01T08:00:00Z1
- 1978-04-01T08:00:00Z1
- 1979-041
- 1979-04-01T08:00:00Z1
- 1980-04-01T08:00:00Z1
- 1981-01-01T08:00:00Z1
- 1982-04-01T08:00:00Z1
- 1983-04-01T08:00:00Z1
- 1986-04-01T08:00:00Z1
- 1987-04-01T08:00:00Z1
- 1988-04-01T08:00:00Z1
- 1989-01-01T08:00:00Z1