| Value | Category | Cases | |
|---|---|---|---|
| 1 | Glass | 73 |
43.2%
|
| 2 | Wood shutters | 76 |
45%
|
| 3 | No cover | 13 |
7.7%
|
| 4 | Other (specify) | 1 |
0.6%
|
| 5 | No window | 6 |
3.6%
|
| Sysmiss | 81 |