| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 |
1.6%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 40 |
3%
|
| 0 | 754 |
56.4%
|
|
| 5 | 3 |
0.2%
|
|
| 10 | 2 |
0.1%
|
|
| 20 | 8 |
0.6%
|
|
| 25 | 1 |
0.1%
|
|
| 30 | 1 |
0.1%
|
|
| 40 | 6 |
0.4%
|
|
| 50 | 40 |
3%
|
|
| 60 | 6 |
0.4%
|
|
| 65 | 2 |
0.1%
|
|
| 70 | 8 |
0.6%
|
|
| 75 | 2 |
0.1%
|
|
| 80 | 29 |
2.2%
|
|
| 90 | 11 |
0.8%
|
|
| 92 | 1 |
0.1%
|
|
| 95 | 2 |
0.1%
|
|
| 100 | 400 |
29.9%
|