| Value | Category | Cases | |
|---|---|---|---|
| 1 | Hole smaller than a thumb/figer 0.2-2 cm | 1415 |
11.1%
|
| 2 | Hole larger than thumb but smaller than fist/hand 2-10 cm | 1899 |
14.9%
|
| 3 | Hole larger than fist but smaller than head 10-25 cm | 1246 |
9.8%
|
| 4 | Hole larger than head, more than 25 cm | 898 |
7%
|
| 5 | No holes | 7295 |
57.2%
|
| Sysmiss | 12677 |