| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 23 |
25.3%
|
| 0 | 41 |
45.1%
|
|
| 1 | 2 |
2.2%
|
|
| 2 | 4 |
4.4%
|
|
| 3 | 5 |
5.5%
|
|
| 4 | 1 |
1.1%
|
|
| 5 | 1 |
1.1%
|
|
| 6 | 2 |
2.2%
|
|
| 7 | 1 |
1.1%
|
|
| 9 | 1 |
1.1%
|
|
| 10 | 2 |
2.2%
|
|
| 16 | 1 |
1.1%
|
|
| 20 | 1 |
1.1%
|
|
| 30 | 2 |
2.2%
|
|
| 77 | 1 |
1.1%
|
|
| 80 | 2 |
2.2%
|
|
| 117 | 1 |
1.1%
|
|
| Sysmiss | 286 |