| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | No time was spent | 201 |
38.7%
|
| 1 | 5 |
1%
|
|
| 2 | 5 |
1%
|
|
| 4 | 4 |
0.8%
|
|
| 5 | 37 |
7.1%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 2 |
0.4%
|
|
| 10 | 117 |
22.5%
|
|
| 12 | 2 |
0.4%
|
|
| 15 | 78 |
15%
|
|
| 20 | 47 |
9.1%
|
|
| 25 | 16 |
3.1%
|
|
| 30 | 4 |
0.8%
|