Date
- 1968-01-01T08:00:00Z1
- 1969-01-01T08:00:00Z1
- 1970-01-01T08:00:00Z1
- 1971-01-01T08:00:00Z1
- 1972-01-01T08:00:00Z1
- 1973-01-01T08:00:00Z1
- 1974-01-01T08:00:00Z1
- 1975-01-01T08:00:00Z1
- 1976-01-01T08:00:00Z1
- 1977-01-01T08:00:00Z1
- 1978-01-01T08:00:00Z1
- 1979-01-01T08:00:00Z2
- 1980-01-01T08:00:00Z2
- 1981-01-01T08:00:00Z2
- 1982-01-01T08:00:00Z2
- 1983-01-01T08:00:00Z2
- 1984-01-01T08:00:00Z2
- 1985-01-01T08:00:00Z2
- 1986-01-01T08:00:00Z4
- 1987-01-01T08:00:00Z4