| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
0.9%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 12 |
1%
|
| 0 | 329 |
26.6%
|
|
| 10 | 1 |
0.1%
|
|
| 20 | 1 |
0.1%
|
|
| 25 | 1 |
0.1%
|
|
| 40 | 1 |
0.1%
|
|
| 50 | 13 |
1%
|
|
| 60 | 1 |
0.1%
|
|
| 66 | 1 |
0.1%
|
|
| 70 | 3 |
0.2%
|
|
| 75 | 1 |
0.1%
|
|
| 80 | 6 |
0.5%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 3 |
0.2%
|
|
| 95 | 1 |
0.1%
|
|
| 99 | 1 |
0.1%
|
|
| 100 | 852 |
68.8%
|