| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.7%
|
| 0 | 30 |
22.1%
|
|
| 1 | One minute or less | 11 |
8.1%
|
| 5 | 1 |
0.7%
|
|
| 10 | 5 |
3.7%
|
|
| 12 | 2 |
1.5%
|
|
| 15 | 3 |
2.2%
|
|
| 20 | 4 |
2.9%
|
|
| 21 | 3 |
2.2%
|
|
| 25 | 6 |
4.4%
|
|
| 30 | 29 |
21.3%
|
|
| 32 | 1 |
0.7%
|
|
| 40 | 5 |
3.7%
|
|
| 45 | 5 |
3.7%
|
|
| 50 | 8 |
5.9%
|
|
| 55 | 1 |
0.7%
|
|
| 56 | 1 |
0.7%
|
|
| 59 | 20 |
14.7%
|
|
| Sysmiss | 73 |