| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.9%
|
| 0 | 192 |
71.1%
|
|
| 1 | One minute or less | 19 |
7%
|
| 3 | 1 |
0.4%
|
|
| 5 | 3 |
1.1%
|
|
| 10 | 1 |
0.4%
|
|
| 15 | 5 |
1.9%
|
|
| 20 | 5 |
1.9%
|
|
| 23 | 1 |
0.4%
|
|
| 30 | 27 |
10%
|
|
| 40 | 2 |
0.7%
|
|
| 45 | 2 |
0.7%
|
|
| 59 | 7 |
2.6%
|
|
| Sysmiss | 717 |