| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 21 |
1.3%
|
| 2 | No | 19 |
1.2%
|
| 4 | Missing on paper | 4 |
0.3%
|
| 88 | N/A | 1531 |
97.2%
|
| Sysmiss | 6 |