| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 8 |
25.8%
|
| 2 | 2 |
6.5%
|
|
| 3 | 6 |
19.4%
|
|
| 4 | 1 |
3.2%
|
|
| 5 | 3 |
9.7%
|
|
| 7 | 1 |
3.2%
|
|
| 8 | 2 |
6.5%
|
|
| 10 | 1 |
3.2%
|
|
| 12 | 2 |
6.5%
|
|
| 20 | 1 |
3.2%
|
|
| 24 | 2 |
6.5%
|
|
| 30 | 1 |
3.2%
|
|
| 72 | 1 |
3.2%
|
|
| Sysmiss | 692 |