| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
1.1%
|
| 0 | 26 |
29.5%
|
|
| 1 | 12 |
13.6%
|
|
| 2 | 12 |
13.6%
|
|
| 3 | 7 |
8%
|
|
| 4 | 6 |
6.8%
|
|
| 5 | 2 |
2.3%
|
|
| 6 | 3 |
3.4%
|
|
| 7 | 4 |
4.5%
|
|
| 8 | 1 |
1.1%
|
|
| 10 | 4 |
4.5%
|
|
| 19 | 1 |
1.1%
|
|
| 20 | 2 |
2.3%
|
|
| 30 | 3 |
3.4%
|
|
| 35 | 1 |
1.1%
|
|
| 40 | 1 |
1.1%
|
|
| 90 | 1 |
1.1%
|
|
| 120 | 1 |
1.1%
|
|
| Sysmiss | 684 |