| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| 0 | No time was spent | 10 |
8.3%
|
| 1 | 4 |
3.3%
|
|
| 2 | 24 |
20%
|
|
| 3 | 2 |
1.7%
|
|
| 5 | 21 |
17.5%
|
|
| 10 | 12 |
10%
|
|
| 15 | 3 |
2.5%
|
|
| 20 | 11 |
9.2%
|
|
| 25 | 1 |
0.8%
|
|
| 30 | 12 |
10%
|
|
| 35 | 1 |
0.8%
|
|
| 40 | 3 |
2.5%
|
|
| 50 | 5 |
4.2%
|
|
| 60 | 1 |
0.8%
|
|
| 70 | 1 |
0.8%
|
|
| 80 | 5 |
4.2%
|
|
| 100 | 2 |
1.7%
|