| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
2.2%
|
| -7 | Does not apply is a floor in a building (spontaneous) | 28 |
7.8%
|
| 0 | 157 |
43.5%
|
|
| 3 | 2 |
0.6%
|
|
| 5 | 4 |
1.1%
|
|
| 10 | 4 |
1.1%
|
|
| 20 | 1 |
0.3%
|
|
| 23 | 1 |
0.3%
|
|
| 30 | 2 |
0.6%
|
|
| 33 | 1 |
0.3%
|
|
| 40 | 8 |
2.2%
|
|
| 50 | 15 |
4.2%
|
|
| 60 | 7 |
1.9%
|
|
| 70 | 2 |
0.6%
|
|
| 80 | 4 |
1.1%
|
|
| 90 | 4 |
1.1%
|
|
| 92 | 1 |
0.3%
|
|
| 95 | 3 |
0.8%
|
|
| 96 | 1 |
0.3%
|
|
| 97 | 1 |
0.3%
|
|
| 98 | 1 |
0.3%
|
|
| 99 | 2 |
0.6%
|
|
| 100 | 104 |
28.8%
|