| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, colour changed | 1007 |
5.2%
|
| 2 | No change in colour | 694 |
3.6%
|
| 3 | Reading cannot be taken | 3 |
0%
|
| 9 | Missing | 12 |
0.1%
|
| Sysmiss | 17644 |
91.1%
|