| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 13 |
13.1%
|
|
| 1 | One minute or less | 19 |
19.2%
|
| 5 | 1 |
1%
|
|
| 8 | 1 |
1%
|
|
| 10 | 4 |
4%
|
|
| 15 | 5 |
5.1%
|
|
| 16 | 1 |
1%
|
|
| 20 | 6 |
6.1%
|
|
| 21 | 1 |
1%
|
|
| 25 | 6 |
6.1%
|
|
| 30 | 21 |
21.2%
|
|
| 35 | 1 |
1%
|
|
| 36 | 1 |
1%
|
|
| 37 | 1 |
1%
|
|
| 38 | 1 |
1%
|
|
| 40 | 2 |
2%
|
|
| 45 | 7 |
7.1%
|
|
| 50 | 5 |
5.1%
|
|
| 52 | 1 |
1%
|
|
| 56 | 2 |
2%
|
|
| Sysmiss | 52 |