| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 49 |
60.5%
|
| 2 | 2018 - 2019 | 31 |
38.3%
|
| 3 | 2020 - 2021 | 1 |
1.2%
|
| Missing value | 4 |