| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 36 |
7.3%
|
| 2 | 2018 | 318 |
64.2%
|
| 3 | 2019 | 136 |
27.5%
|
| 4 | 2020 | 5 |
1%
|
| Missing value | 64 |