| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 47 |
9.4%
|
| 2 | 2018 | 320 |
64.1%
|
| 3 | 2019 | 125 |
25.1%
|
| 4 | 2020 | 7 |
1.4%
|
| Missing value | 60 |