| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 1 |
6.3%
|
| 2 | 2018 | 1 |
6.3%
|
| 3 | 2019 | 6 |
37.5%
|
| 4 | 2020 | 4 |
25%
|
| 5 | 2021 | 4 |
25%
|
| Missing value | 877 |