| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
4.5%
|
| 0 | 25 |
28.4%
|
|
| 1 | 15 |
17%
|
|
| 2 | 16 |
18.2%
|
|
| 3 | 7 |
8%
|
|
| 4 | 3 |
3.4%
|
|
| 5 | 4 |
4.5%
|
|
| 6 | 2 |
2.3%
|
|
| 7 | 2 |
2.3%
|
|
| 9 | 2 |
2.3%
|
|
| 10 | 2 |
2.3%
|
|
| 12 | 1 |
1.1%
|
|
| 13 | 1 |
1.1%
|
|
| 15 | 1 |
1.1%
|
|
| 40 | 1 |
1.1%
|
|
| 60 | 1 |
1.1%
|
|
| 230 | 1 |
1.1%
|
|
| Sysmiss | 513 |