| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 27 |
31.4%
|
|
| 1 | One minute or less | 4 |
4.7%
|
| 10 | 3 |
3.5%
|
|
| 15 | 2 |
2.3%
|
|
| 16 | 1 |
1.2%
|
|
| 20 | 1 |
1.2%
|
|
| 24 | 1 |
1.2%
|
|
| 25 | 1 |
1.2%
|
|
| 30 | 25 |
29.1%
|
|
| 40 | 7 |
8.1%
|
|
| 45 | 2 |
2.3%
|
|
| 50 | 6 |
7%
|
|
| 58 | 3 |
3.5%
|
|
| 59 | 3 |
3.5%
|
|
| Sysmiss | 71 |