| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 197 |
14.9%
|
| 0 | No time was spent | 522 |
39.5%
|
| 1 | 28 |
2.1%
|
|
| 2 | 29 |
2.2%
|
|
| 3 | 19 |
1.4%
|
|
| 4 | 4 |
0.3%
|
|
| 5 | 140 |
10.6%
|
|
| 6 | 1 |
0.1%
|
|
| 7 | 3 |
0.2%
|
|
| 8 | 3 |
0.2%
|
|
| 10 | 93 |
7%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 64 |
4.8%
|
|
| 20 | 99 |
7.5%
|
|
| 25 | 20 |
1.5%
|
|
| 30 | 44 |
3.3%
|
|
| 35 | 13 |
1%
|
|
| 40 | 16 |
1.2%
|
|
| 50 | 14 |
1.1%
|
|
| 60 | 5 |
0.4%
|
|
| 65 | 1 |
0.1%
|
|
| 70 | 2 |
0.2%
|
|
| 75 | 1 |
0.1%
|
|
| 80 | 1 |
0.1%
|
|
| 90 | 1 |
0.1%
|
|
| 100 | 2 |
0.2%
|