| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 25 |
10.7%
|
| 0 | 21 |
9%
|
|
| 1 | 3 |
1.3%
|
|
| 2 | 11 |
4.7%
|
|
| 4 | 59 |
25.2%
|
|
| 6 | 2 |
0.9%
|
|
| 8 | 50 |
21.4%
|
|
| 10 | 2 |
0.9%
|
|
| 12 | 33 |
14.1%
|
|
| 16 | 8 |
3.4%
|
|
| 20 | 6 |
2.6%
|
|
| 24 | 5 |
2.1%
|
|
| 36 | 1 |
0.4%
|
|
| 60 | 3 |
1.3%
|
|
| 72 | 1 |
0.4%
|
|
| 120 | 4 |
1.7%
|
|
| Sysmiss | 128 |