| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 81 |
27.8%
|
| 2 | 2018 | 117 |
40.2%
|
| 3 | 2019 | 63 |
21.6%
|
| 4 | 2020 | 19 |
6.5%
|
| 5 | 2021 | 11 |
3.8%
|
| Missing value | 115 |