| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.3%
|
| 0 | Less than 1 hour | 58 |
38.2%
|
| 1 | 22 |
14.5%
|
|
| 2 | 11 |
7.2%
|
|
| 3 | 9 |
5.9%
|
|
| 4 | 12 |
7.9%
|
|
| 5 | 3 |
2%
|
|
| 6 | 2 |
1.3%
|
|
| 8 | 3 |
2%
|
|
| 10 | 3 |
2%
|
|
| 12 | 2 |
1.3%
|
|
| 16 | 2 |
1.3%
|
|
| 22 | 2 |
1.3%
|
|
| 24 | 8 |
5.3%
|
|
| 30 | 1 |
0.7%
|
|
| 48 | 2 |
1.3%
|
|
| 56 | 1 |
0.7%
|
|
| 60 | 1 |
0.7%
|
|
| 64 | 1 |
0.7%
|
|
| 72 | 2 |
1.3%
|
|
| 160 | 1 |
0.7%
|
|
| 168 | 1 |
0.7%
|
|
| Sysmiss | 855 |