| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 230 |
33.9%
|
| 2 | 2018 | 134 |
19.7%
|
| 3 | 2019 | 177 |
26.1%
|
| 4 | 2020 | 80 |
11.8%
|
| 5 | 2021 | 58 |
8.5%
|
| Missing value | 40 |