| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
6%
|
| 0 | No time was spent | 62 |
23.1%
|
| 1 | 24 |
9%
|
|
| 2 | 19 |
7.1%
|
|
| 3 | 9 |
3.4%
|
|
| 4 | 2 |
0.7%
|
|
| 5 | 41 |
15.3%
|
|
| 6 | 2 |
0.7%
|
|
| 8 | 1 |
0.4%
|
|
| 10 | 48 |
17.9%
|
|
| 15 | 10 |
3.7%
|
|
| 16 | 1 |
0.4%
|
|
| 20 | 16 |
6%
|
|
| 25 | 1 |
0.4%
|
|
| 30 | 9 |
3.4%
|
|
| 40 | 1 |
0.4%
|
|
| 50 | 3 |
1.1%
|
|
| 60 | 1 |
0.4%
|
|
| 70 | 1 |
0.4%
|
|
| 100 | 1 |
0.4%
|