| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
27%
|
| 1 | One hour or less | 18 |
24.3%
|
| 2 | 2 |
2.7%
|
|
| 3 | 10 |
13.5%
|
|
| 4 | 5 |
6.8%
|
|
| 5 | 3 |
4.1%
|
|
| 8 | 3 |
4.1%
|
|
| 24 | 1 |
1.4%
|
|
| 25 | 1 |
1.4%
|
|
| 30 | 1 |
1.4%
|
|
| 40 | 1 |
1.4%
|
|
| 45 | 2 |
2.7%
|
|
| 48 | 1 |
1.4%
|
|
| 55 | 1 |
1.4%
|
|
| 72 | 3 |
4.1%
|
|
| 75 | 1 |
1.4%
|
|
| 120 | 1 |
1.4%
|
|
| Sysmiss | 77 |