| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 83 |
23.5%
|
| 2 | 2018 | 149 |
42.2%
|
| 3 | 2019 | 105 |
29.7%
|
| 4 | 2020 | 14 |
4%
|
| 5 | 2021 | 2 |
0.6%
|
| Missing value | 53 |