| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2017 or earlier | 651 |
57.3%
|
| 2 | 2018 | 265 |
23.3%
|
| 3 | 2019 | 203 |
17.9%
|
| 4 | 2020 | 9 |
0.8%
|
| 5 | 2021 | 8 |
0.7%
|
| Missing value | 10 |