| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.5%
|
|
| 1 | Safety | 2 |
1.1%
|
| 2 | Building | 4 |
2.1%
|
| 3 | Bad weat | 2 |
1.1%
|
| 4 | No teach | 13 |
6.9%
|
| 5 | Other | 163 |
86.7%
|
| 12 | 2 |
1.1%
|
|
| 18 | 1 |
0.5%
|
|
| Sysmiss | 77 |