| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
5.2%
|
| 0 | Less than 1 hour | 35 |
20.2%
|
| 1 | 17 |
9.8%
|
|
| 2 | 26 |
15%
|
|
| 3 | 16 |
9.2%
|
|
| 4 | 13 |
7.5%
|
|
| 5 | 11 |
6.4%
|
|
| 6 | 4 |
2.3%
|
|
| 8 | 5 |
2.9%
|
|
| 10 | 10 |
5.8%
|
|
| 12 | 1 |
0.6%
|
|
| 15 | 3 |
1.7%
|
|
| 20 | 6 |
3.5%
|
|
| 21 | 1 |
0.6%
|
|
| 24 | 5 |
2.9%
|
|
| 30 | 5 |
2.9%
|
|
| 32 | 1 |
0.6%
|
|
| 40 | 1 |
0.6%
|
|
| 48 | 1 |
0.6%
|
|
| 60 | 1 |
0.6%
|
|
| 72 | 1 |
0.6%
|
|
| 92 | 1 |
0.6%
|
|
| Sysmiss | 172 |