| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. dark, gloomy | 628 |
20.6%
|
| 2 | 2. poor light | 717 |
23.5%
|
| 3 | 3. average light | 725 |
23.8%
|
| 4 | 4. bright | 979 |
32.1%
|
| Sysmiss | 1489 |