| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
4.8%
|
| 1 | One hour or less | 47 |
56%
|
| 2 | 7 |
8.3%
|
|
| 3 | 7 |
8.3%
|
|
| 4 | 2 |
2.4%
|
|
| 5 | 4 |
4.8%
|
|
| 8 | 2 |
2.4%
|
|
| 10 | 2 |
2.4%
|
|
| 12 | 1 |
1.2%
|
|
| 20 | 4 |
4.8%
|
|
| 30 | 2 |
2.4%
|
|
| 48 | 1 |
1.2%
|
|
| 72 | 1 |
1.2%
|
|
| Sysmiss | 1253 |