| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 222 |
16.6%
|
| 0 | No time was spent | 445 |
33.3%
|
| 1 | 83 |
6.2%
|
|
| 2 | 36 |
2.7%
|
|
| 3 | 11 |
0.8%
|
|
| 5 | 95 |
7.1%
|
|
| 6 | 1 |
0.1%
|
|
| 7 | 3 |
0.2%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 128 |
9.6%
|
|
| 11 | 1 |
0.1%
|
|
| 13 | 1 |
0.1%
|
|
| 15 | 61 |
4.6%
|
|
| 20 | 58 |
4.3%
|
|
| 25 | 24 |
1.8%
|
|
| 30 | 35 |
2.6%
|
|
| 35 | 8 |
0.6%
|
|
| 40 | 20 |
1.5%
|
|
| 45 | 3 |
0.2%
|
|
| 50 | 40 |
3%
|
|
| 55 | 1 |
0.1%
|
|
| 60 | 16 |
1.2%
|
|
| 65 | 3 |
0.2%
|
|
| 70 | 13 |
1%
|
|
| 75 | 3 |
0.2%
|
|
| 80 | 13 |
1%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 5 |
0.4%
|
|
| 100 | 6 |
0.4%
|