| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
0.7%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 12 |
0.7%
|
| 0 | 1580 |
97%
|
|
| 10 | 1 |
0.1%
|
|
| 13 | 1 |
0.1%
|
|
| 30 | 1 |
0.1%
|
|
| 100 | 23 |
1.4%
|
|
| Sysmiss | 366 |