| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 11 |
22%
|
| 2 | 2018 | 8 |
16%
|
| 3 | 2019 | 16 |
32%
|
| 4 | 2020 | 5 |
10%
|
| 5 | 2021 | 10 |
20%
|
| Missing value | 4159 |