| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
9.1%
|
| 0 | No time was spent | 256 |
68.3%
|
| 1 | 4 |
1.1%
|
|
| 2 | 5 |
1.3%
|
|
| 3 | 12 |
3.2%
|
|
| 4 | 2 |
0.5%
|
|
| 5 | 6 |
1.6%
|
|
| 6 | 3 |
0.8%
|
|
| 7 | 2 |
0.5%
|
|
| 10 | 3 |
0.8%
|
|
| 12 | 7 |
1.9%
|
|
| 15 | 2 |
0.5%
|
|
| 20 | 7 |
1.9%
|
|
| 24 | 8 |
2.1%
|
|
| 30 | 4 |
1.1%
|
|
| 32 | 1 |
0.3%
|
|
| 36 | 2 |
0.5%
|
|
| 45 | 1 |
0.3%
|
|
| 48 | 5 |
1.3%
|
|
| 50 | 4 |
1.1%
|
|
| 60 | 4 |
1.1%
|
|
| 90 | 3 |
0.8%
|