| Type | From | To |
|---|---|---|
| 1958-06-01 00:00 | 1961-08-31 23:54 | |
| 1965-05-01 00:00 | 1965-05-31 23:54 | |
| 1967-04-01 00:00 | 1969-12-31 23:54 | |
| 1973-06-01 00:00 | 1976-11-30 23:54 | |
| 1977-07-01 00:00 | 1977-11-30 23:54 | |
| 1978-05-01 00:00 | 1978-10-31 23:54 | |
| 1979-03-01 00:00 | 1980-12-31 23:54 |