| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 19 |
0.1%
|
|
| 2017 | 33 |
0.2%
|
|
| 2018 | 3 |
0%
|
|
| 8888 | Not applicable | 20733 |
98.8%
|
| 9999 | Unspecified | 197 |
0.9%
|