| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
5.3%
|
| 0 | No time was spent | 79 |
69.3%
|
| 1 | 5 |
4.4%
|
|
| 2 | 2 |
1.8%
|
|
| 3 | 2 |
1.8%
|
|
| 5 | 1 |
0.9%
|
|
| 8 | 1 |
0.9%
|
|
| 10 | 6 |
5.3%
|
|
| 12 | 1 |
0.9%
|
|
| 14 | 1 |
0.9%
|
|
| 15 | 1 |
0.9%
|
|
| 20 | 5 |
4.4%
|
|
| 23 | 1 |
0.9%
|
|
| 25 | 1 |
0.9%
|
|
| 30 | 1 |
0.9%
|
|
| 40 | 1 |
0.9%
|