| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
1.3%
|
| 0 | 79 |
32.9%
|
|
| 5 | 4 |
1.7%
|
|
| 7 | 1 |
0.4%
|
|
| 10 | 21 |
8.8%
|
|
| 15 | 8 |
3.3%
|
|
| 20 | 41 |
17.1%
|
|
| 25 | 1 |
0.4%
|
|
| 27 | 1 |
0.4%
|
|
| 30 | 41 |
17.1%
|
|
| 35 | 5 |
2.1%
|
|
| 40 | 21 |
8.8%
|
|
| 45 | 1 |
0.4%
|
|
| 50 | 10 |
4.2%
|
|
| 70 | 2 |
0.8%
|
|
| 80 | 1 |
0.4%
|
|
| Sysmiss | 119 |