| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 236 |
67.2%
|
| 2 | 2018 | 59 |
16.8%
|
| 3 | 2019 | 56 |
16%
|
| 4 | 2020 | 0 |
0%
|
| Missing value | 37 |