| 2020 Issues | 2019 Issues | 2018 Issues | 2017 Issues |
|---|---|---|---|
| January | January | January | January |
| February | February | February | |
| March | March | March | |
| April | April | April | |
| May | May | May | |
| June | June | June | |
| July | July | July | |
| Aug/Sept | Aug/Sept | Aug/Sept | |
| October | October | October | |
| November | November | November | |
| December | December | December |