| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 150 |
36.5%
|
| 2 | 2018 | 72 |
17.5%
|
| 3 | 2019 | 85 |
20.7%
|
| 4 | 2020 | 104 |
25.3%
|
| Missing value | 77 |