| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 19 |
24.7%
|
| 1 | One hour or less | 12 |
15.6%
|
| 2 | 5 |
6.5%
|
|
| 3 | 1 |
1.3%
|
|
| 5 | 1 |
1.3%
|
|
| 6 | 1 |
1.3%
|
|
| 8 | 1 |
1.3%
|
|
| 15 | 3 |
3.9%
|
|
| 20 | 2 |
2.6%
|
|
| 24 | 1 |
1.3%
|
|
| 30 | 12 |
15.6%
|
|
| 35 | 1 |
1.3%
|
|
| 46 | 1 |
1.3%
|
|
| 48 | 4 |
5.2%
|
|
| 50 | 5 |
6.5%
|
|
| 60 | 2 |
2.6%
|
|
| 72 | 2 |
2.6%
|
|
| 75 | 1 |
1.3%
|
|
| 85 | 1 |
1.3%
|
|
| 92 | 1 |
1.3%
|
|
| 160 | 1 |
1.3%
|
|
| Sysmiss | 74 |