| Year | First Half | Second Half |
|---|---|---|
| 2014 | June | December |
| 2015 | June | December |
| 2016 | June | December |
| 2017 | June | December |
| 2018 | June | December(choice based) | December(credit based) |
| 2019 | June(choice based) | June(credit based) | December(choice based) | December(credit based) |
| 2021 | June(choice based) | December(choice based) |
