| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 60 |
7.7%
|
| 2 | 2018 | 427 |
54.5%
|
| 3 | 2019 | 266 |
34%
|
| 4 | 2020 | 19 |
2.4%
|
| 5 | 2021 | 11 |
1.4%
|
| Missing value | 89 |