| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
5.6%
|
| 0 | No time was spent | 18 |
5%
|
| 1 | 11 |
3.1%
|
|
| 2 | 7 |
1.9%
|
|
| 3 | 5 |
1.4%
|
|
| 5 | 33 |
9.2%
|
|
| 7 | 2 |
0.6%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 83 |
23.1%
|
|
| 15 | 16 |
4.5%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 55 |
15.3%
|
|
| 25 | 5 |
1.4%
|
|
| 30 | 23 |
6.4%
|
|
| 40 | 4 |
1.1%
|
|
| 45 | 1 |
0.3%
|
|
| 50 | 20 |
5.6%
|
|
| 56 | 1 |
0.3%
|
|
| 60 | 5 |
1.4%
|
|
| 70 | 3 |
0.8%
|
|
| 75 | 1 |
0.3%
|
|
| 80 | 6 |
1.7%
|
|
| 90 | 3 |
0.8%
|
|
| 100 | 35 |
9.7%
|