| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 36 |
43.9%
|
| 2 | 2018 | 29 |
35.4%
|
| 3 | 2019 | 13 |
15.9%
|
| 4 | 2020 | 0 |
0%
|
| 5 | 2021 | 4 |
4.9%
|
| Missing value | 26 |