| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 26 |
29.9%
|
| 1 | One hour or less | 2 |
2.3%
|
| 2 | 1 |
1.1%
|
|
| 3 | 1 |
1.1%
|
|
| 4 | 4 |
4.6%
|
|
| 5 | 2 |
2.3%
|
|
| 6 | 1 |
1.1%
|
|
| 7 | 2 |
2.3%
|
|
| 8 | 11 |
12.6%
|
|
| 10 | 3 |
3.4%
|
|
| 12 | 4 |
4.6%
|
|
| 14 | 2 |
2.3%
|
|
| 15 | 1 |
1.1%
|
|
| 16 | 4 |
4.6%
|
|
| 20 | 5 |
5.7%
|
|
| 22 | 1 |
1.1%
|
|
| 24 | 5 |
5.7%
|
|
| 25 | 1 |
1.1%
|
|
| 30 | 2 |
2.3%
|
|
| 40 | 4 |
4.6%
|
|
| 48 | 1 |
1.1%
|
|
| 64 | 1 |
1.1%
|
|
| 72 | 1 |
1.1%
|
|
| 80 | 1 |
1.1%
|
|
| 160 | 1 |
1.1%
|
|
| Sysmiss | 70 |