| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 21 |
32.8%
|
| 2 | 19 |
29.7%
|
|
| 3 | 8 |
12.5%
|
|
| 4 | 6 |
9.4%
|
|
| 5 | 1 |
1.6%
|
|
| 6 | 2 |
3.1%
|
|
| 7 | 1 |
1.6%
|
|
| 10 | 2 |
3.1%
|
|
| 24 | 1 |
1.6%
|
|
| 30 | 1 |
1.6%
|
|
| 59 | 1 |
1.6%
|
|
| 72 | 1 |
1.6%
|
|
| Sysmiss | 902 |