| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 116 |
37.4%
|
| 1 | One hour or less | 7 |
2.3%
|
| 10 | 3 |
1%
|
|
| 12 | 2 |
0.6%
|
|
| 20 | 2 |
0.6%
|
|
| 24 | 3 |
1%
|
|
| 25 | 5 |
1.6%
|
|
| 30 | 46 |
14.8%
|
|
| 35 | 47 |
15.2%
|
|
| 40 | 26 |
8.4%
|
|
| 42 | 1 |
0.3%
|
|
| 45 | 9 |
2.9%
|
|
| 48 | 9 |
2.9%
|
|
| 50 | 12 |
3.9%
|
|
| 60 | 9 |
2.9%
|
|
| 70 | 1 |
0.3%
|
|
| 72 | 5 |
1.6%
|
|
| 80 | 1 |
0.3%
|
|
| 90 | 4 |
1.3%
|
|
| 120 | 2 |
0.6%
|
|
| Sysmiss | 709 |