| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 38 |
20.9%
|
| 0 | 40 |
22%
|
|
| 1 | 25 |
13.7%
|
|
| 2 | 19 |
10.4%
|
|
| 3 | 15 |
8.2%
|
|
| 4 | 6 |
3.3%
|
|
| 5 | 11 |
6%
|
|
| 6 | 1 |
0.5%
|
|
| 7 | 4 |
2.2%
|
|
| 8 | 4 |
2.2%
|
|
| 10 | 4 |
2.2%
|
|
| 11 | 1 |
0.5%
|
|
| 12 | 1 |
0.5%
|
|
| 15 | 2 |
1.1%
|
|
| 20 | 5 |
2.7%
|
|
| 23 | 1 |
0.5%
|
|
| 30 | 2 |
1.1%
|
|
| 45 | 1 |
0.5%
|
|
| 60 | 1 |
0.5%
|
|
| 170 | 1 |
0.5%
|
|
| Sysmiss | 179 |