| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
11.3%
|
| 0 | No time was spent | 79 |
52.3%
|
| 1 | 4 |
2.6%
|
|
| 2 | 12 |
7.9%
|
|
| 3 | 4 |
2.6%
|
|
| 4 | 2 |
1.3%
|
|
| 5 | 1 |
0.7%
|
|
| 6 | 1 |
0.7%
|
|
| 8 | 3 |
2%
|
|
| 10 | 7 |
4.6%
|
|
| 15 | 1 |
0.7%
|
|
| 19 | 1 |
0.7%
|
|
| 20 | 7 |
4.6%
|
|
| 24 | 1 |
0.7%
|
|
| 30 | 6 |
4%
|
|
| 40 | 2 |
1.3%
|
|
| 60 | 2 |
1.3%
|
|
| 73 | 1 |
0.7%
|