| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
6.7%
|
| 1 | One hour or less | 29 |
32.6%
|
| 2 | 5 |
5.6%
|
|
| 3 | 3 |
3.4%
|
|
| 4 | 6 |
6.7%
|
|
| 5 | 6 |
6.7%
|
|
| 6 | 6 |
6.7%
|
|
| 7 | 2 |
2.2%
|
|
| 8 | 5 |
5.6%
|
|
| 12 | 9 |
10.1%
|
|
| 16 | 1 |
1.1%
|
|
| 18 | 1 |
1.1%
|
|
| 24 | 8 |
9%
|
|
| 50 | 1 |
1.1%
|
|
| 76 | 1 |
1.1%
|
|
| Sysmiss | 913 |