| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 73 |
9.2%
|
| 2 | 2018 | 435 |
54.8%
|
| 3 | 2019 | 253 |
31.9%
|
| 4 | 2020 | 18 |
2.3%
|
| 5 | 2021 | 15 |
1.9%
|
| Missing value | 78 |