| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 52 |
6.8%
|
| 0 | No time was spent | 236 |
31.1%
|
| 1 | 10 |
1.3%
|
|
| 2 | 28 |
3.7%
|
|
| 3 | 6 |
0.8%
|
|
| 4 | 1 |
0.1%
|
|
| 5 | 107 |
14.1%
|
|
| 6 | 4 |
0.5%
|
|
| 7 | 4 |
0.5%
|
|
| 8 | 7 |
0.9%
|
|
| 10 | 127 |
16.7%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 33 |
4.3%
|
|
| 18 | 2 |
0.3%
|
|
| 20 | 48 |
6.3%
|
|
| 25 | 16 |
2.1%
|
|
| 30 | 28 |
3.7%
|
|
| 40 | 15 |
2%
|
|
| 50 | 14 |
1.8%
|
|
| 60 | 13 |
1.7%
|
|
| 70 | 3 |
0.4%
|
|
| 80 | 3 |
0.4%
|
|
| 100 | 2 |
0.3%
|