| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.3%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 32 |
3%
|
| 0 | 988 |
93%
|
|
| 10 | 1 |
0.1%
|
|
| 40 | 1 |
0.1%
|
|
| 50 | 1 |
0.1%
|
|
| 75 | 1 |
0.1%
|
|
| 100 | 35 |
3.3%
|
|
| Sysmiss | 1007 |