| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. dark, gloomy | 332 |
10.9%
|
| 2 | 2. poor light | 689 |
22.7%
|
| 3 | 3. average light | 820 |
27%
|
| 4 | 4. bright | 1197 |
39.4%
|
| Sysmiss | 1500 |