| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 106 |
45.5%
|
| 2 | 2018 | 21 |
9%
|
| 3 | 2019 | 36 |
15.5%
|
| 4 | 2020 | 42 |
18%
|
| 5 | 2021 | 28 |
12%
|
| Missing value | 1553 |