| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 15 |
4.2%
|
| 0 | 135 |
37.5%
|
|
| 10 | 1 |
0.3%
|
|
| 20 | 4 |
1.1%
|
|
| 45 | 1 |
0.3%
|
|
| 50 | 2 |
0.6%
|
|
| 60 | 2 |
0.6%
|
|
| 70 | 1 |
0.3%
|
|
| 80 | 2 |
0.6%
|
|
| 86 | 1 |
0.3%
|
|
| 100 | 195 |
54.2%
|