| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 11 |
0.1%
|
|
| 2017 | 57 |
0.3%
|
|
| 2018 | 4 |
0%
|
|
| 8888 | Not applicable | 20831 |
98.3%
|
| 9999 | Unspecified | 287 |
1.4%
|