| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 32 |
12.3%
|
| 2 | 2018 | 43 |
16.5%
|
| 3 | 2019 | 69 |
26.5%
|
| 4 | 2020 | 74 |
28.5%
|
| 5 | 2021 | 42 |
16.2%
|
| Missing value | 146 |