| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
2.7%
|
| 0 | No time was spent | 113 |
18.8%
|
| 1 | 100 |
16.7%
|
|
| 2 | 68 |
11.3%
|
|
| 3 | 32 |
5.3%
|
|
| 4 | 12 |
2%
|
|
| 5 | 140 |
23.3%
|
|
| 6 | 1 |
0.2%
|
|
| 7 | 3 |
0.5%
|
|
| 8 | 2 |
0.3%
|
|
| 10 | 61 |
10.2%
|
|
| 11 | 1 |
0.2%
|
|
| 12 | 1 |
0.2%
|
|
| 13 | 1 |
0.2%
|
|
| 15 | 13 |
2.2%
|
|
| 20 | 20 |
3.3%
|
|
| 25 | 11 |
1.8%
|
|
| 30 | 4 |
0.7%
|
|
| 50 | 1 |
0.2%
|