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Note: Unverified issues are gold, secondary verifications are light blue
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | No month | |
| 1956 | January | - | March | - | May | - | July | - | - | - | - | - | - |
| 1955 | - | February | - | April | - | June | - | August | - | October | - | - | - |
| 1954 | January | - | March | - | May | - | - | August | - | October | - | December | - |
| 1953 | - | - | - | - | - | - | - | - | - | - | November | - | - |