| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 228 |
65%
|
| 2 | 2018 | 60 |
17.1%
|
| 3 | 2019 | 63 |
17.9%
|
| 4 | 2020 | 0 |
0%
|
| Missing value | 37 |