| 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 | 873 |
70.5%
|
|
| 1 | 1 |
0.1%
|
|
| 5 | 1 |
0.1%
|
|
| 10 | 3 |
0.2%
|
|
| 15 | 1 |
0.1%
|
|
| 20 | 7 |
0.6%
|
|
| 25 | 1 |
0.1%
|
|
| 30 | 2 |
0.2%
|
|
| 34 | 1 |
0.1%
|
|
| 40 | 1 |
0.1%
|
|
| 50 | 13 |
1%
|
|
| 60 | 1 |
0.1%
|
|
| 75 | 1 |
0.1%
|
|
| 80 | 1 |
0.1%
|
|
| 90 | 1 |
0.1%
|
|
| 100 | 308 |
24.9%
|