| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 8 |
0.2%
|
|
| 2016 | 297 |
7.9%
|
|
| 2017 | 623 |
16.6%
|
|
| 2018 | 201 |
5.4%
|
|
| 9999 | NO RESPONDE | 1 |
0%
|
| Sysmiss | 2627 |
69.9%
|