| Year | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1969 | January | February | March | April | May | June | July | August | September | October | November | December |
| 1970 | January | February | March | April | May | June | July | August | September | October | November | December |
| 1971 | January | February | March | April | May | June | July | August | September | October | November | December |
| 1972 | January | February | March | April | May | June | July | August | September | October | November | December |
| 1975 | January | February | March | April | May | June | July | August | September | October | November | December |