| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 18 |
12.3%
|
| 2 | 6 |
4.1%
|
|
| 3 | 13 |
8.9%
|
|
| 4 | 8 |
5.5%
|
|
| 5 | 15 |
10.3%
|
|
| 6 | 13 |
8.9%
|
|
| 7 | 4 |
2.7%
|
|
| 8 | 21 |
14.4%
|
|
| 10 | 2 |
1.4%
|
|
| 12 | 16 |
11%
|
|
| 14 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| 24 | 17 |
11.6%
|
|
| 48 | 3 |
2.1%
|
|
| 56 | 1 |
0.7%
|
|
| 72 | 4 |
2.7%
|
|
| 120 | 1 |
0.7%
|
|
| 168 | 1 |
0.7%
|
|
| 336 | 1 |
0.7%
|
|
| Sysmiss | 476 |