| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
13.8%
|
| 0 | No time was spent | 36 |
24.8%
|
| 1 | 3 |
2.1%
|
|
| 2 | 1 |
0.7%
|
|
| 3 | 1 |
0.7%
|
|
| 5 | 11 |
7.6%
|
|
| 6 | 2 |
1.4%
|
|
| 7 | 1 |
0.7%
|
|
| 8 | 3 |
2.1%
|
|
| 10 | 13 |
9%
|
|
| 15 | 6 |
4.1%
|
|
| 20 | 21 |
14.5%
|
|
| 24 | 1 |
0.7%
|
|
| 25 | 1 |
0.7%
|
|
| 30 | 11 |
7.6%
|
|
| 35 | 2 |
1.4%
|
|
| 40 | 3 |
2.1%
|
|
| 50 | 4 |
2.8%
|
|
| 60 | 1 |
0.7%
|
|
| 75 | 2 |
1.4%
|
|
| 80 | 1 |
0.7%
|
|
| 100 | 1 |
0.7%
|