| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 50 |
9.5%
|
| 2 | 2018 | 281 |
53.5%
|
| 3 | 2019 | 159 |
30.3%
|
| 4 | 2020 | 25 |
4.8%
|
| 5 | 2021 | 10 |
1.9%
|
| Missing value | 22 |