| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 174 |
22.5%
|
| 0 | No time was spent | 266 |
34.5%
|
| 1 | 43 |
5.6%
|
|
| 2 | 33 |
4.3%
|
|
| 3 | 13 |
1.7%
|
|
| 4 | 3 |
0.4%
|
|
| 5 | 49 |
6.3%
|
|
| 6 | 1 |
0.1%
|
|
| 7 | 2 |
0.3%
|
|
| 8 | 2 |
0.3%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 50 |
6.5%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 23 |
3%
|
|
| 18 | 1 |
0.1%
|
|
| 20 | 27 |
3.5%
|
|
| 25 | 10 |
1.3%
|
|
| 30 | 24 |
3.1%
|
|
| 35 | 1 |
0.1%
|
|
| 40 | 9 |
1.2%
|
|
| 45 | 2 |
0.3%
|
|
| 50 | 23 |
3%
|
|
| 60 | 3 |
0.4%
|
|
| 70 | 2 |
0.3%
|
|
| 80 | 4 |
0.5%
|
|
| 100 | 5 |
0.6%
|