| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 58 |
4.2%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 74 |
5.4%
|
| 0 | 796 |
58.1%
|
|
| 5 | 2 |
0.1%
|
|
| 10 | 7 |
0.5%
|
|
| 15 | 1 |
0.1%
|
|
| 20 | 26 |
1.9%
|
|
| 25 | 1 |
0.1%
|
|
| 30 | 12 |
0.9%
|
|
| 35 | 3 |
0.2%
|
|
| 40 | 11 |
0.8%
|
|
| 50 | 33 |
2.4%
|
|
| 60 | 4 |
0.3%
|
|
| 65 | 1 |
0.1%
|
|
| 70 | 6 |
0.4%
|
|
| 80 | 8 |
0.6%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 7 |
0.5%
|
|
| 100 | 318 |
23.2%
|