| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 46 |
32.2%
|
| 2 | 2018 | 13 |
9.1%
|
| 3 | 2019 | 17 |
11.9%
|
| 4 | 2020 | 18 |
12.6%
|
| 5 | 2021 | 49 |
34.3%
|
| Missing value | 293 |