| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 2 |
0%
|
|
| 2016 | 289 |
1.4%
|
|
| 2017 | 556 |
2.6%
|
|
| 2018 | 22 |
0.1%
|
|
| 8888 | Not applicable | 20056 |
94.6%
|
| 9999 | Unspecified | 265 |
1.3%
|