| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1%
|
| 0 | Less than 1 hour | 17 |
17.3%
|
| 1 | 17 |
17.3%
|
|
| 2 | 13 |
13.3%
|
|
| 3 | 8 |
8.2%
|
|
| 4 | 2 |
2%
|
|
| 5 | 7 |
7.1%
|
|
| 6 | 1 |
1%
|
|
| 7 | 1 |
1%
|
|
| 8 | 4 |
4.1%
|
|
| 10 | 8 |
8.2%
|
|
| 12 | 1 |
1%
|
|
| 15 | 1 |
1%
|
|
| 20 | 1 |
1%
|
|
| 24 | 6 |
6.1%
|
|
| 25 | 1 |
1%
|
|
| 45 | 2 |
2%
|
|
| 50 | 1 |
1%
|
|
| 72 | 1 |
1%
|
|
| 96 | 1 |
1%
|
|
| 110 | 1 |
1%
|
|
| 168 | 1 |
1%
|
|
| 200 | 1 |
1%
|
|
| 360 | 1 |
1%
|
|
| Sysmiss | 50 |