| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 172 |
21.1%
|
| 2 | 2018 | 130 |
16%
|
| 3 | 2019 | 208 |
25.5%
|
| 4 | 2020 | 124 |
15.2%
|
| 5 | 2021 | 181 |
22.2%
|
| Missing value | 14 |