| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 156 |
14.2%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 50 |
4.6%
|
| 0 | 563 |
51.4%
|
|
| 1 | 1 |
0.1%
|
|
| 5 | 1 |
0.1%
|
|
| 10 | 5 |
0.5%
|
|
| 13 | 1 |
0.1%
|
|
| 15 | 1 |
0.1%
|
|
| 20 | 27 |
2.5%
|
|
| 25 | 1 |
0.1%
|
|
| 28 | 1 |
0.1%
|
|
| 30 | 27 |
2.5%
|
|
| 40 | 24 |
2.2%
|
|
| 44 | 1 |
0.1%
|
|
| 50 | 37 |
3.4%
|
|
| 60 | 6 |
0.5%
|
|
| 70 | 5 |
0.5%
|
|
| 80 | 4 |
0.4%
|
|
| 100 | 185 |
16.9%
|