| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 2 |
5.1%
|
| 2 | 6 |
15.4%
|
|
| 3 | 3 |
7.7%
|
|
| 4 | 4 |
10.3%
|
|
| 5 | 2 |
5.1%
|
|
| 6 | 3 |
7.7%
|
|
| 7 | 1 |
2.6%
|
|
| 10 | 1 |
2.6%
|
|
| 12 | 3 |
7.7%
|
|
| 24 | 2 |
5.1%
|
|
| 25 | 1 |
2.6%
|
|
| 36 | 1 |
2.6%
|
|
| 48 | 2 |
5.1%
|
|
| 72 | 4 |
10.3%
|
|
| 120 | 1 |
2.6%
|
|
| 144 | 1 |
2.6%
|
|
| 168 | 2 |
5.1%
|
|
| Sysmiss | 561 |