| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 25 |
18.1%
|
| 2 | 2018 | 59 |
42.8%
|
| 3 | 2019 | 47 |
34.1%
|
| 4 | 2020 | 7 |
5.1%
|
| Missing value | 45 |