| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 500 |
13.3%
|
|
| 2016 | 661 |
17.6%
|
|
| 2017 | 635 |
16.9%
|
|
| 2018 | 119 |
3.2%
|
|
| 9999 | NO RESPONDE | 2 |
0.1%
|
| Sysmiss | 1840 |
49%
|