| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 41 |
21.5%
|
|
| 5 | 9 |
4.7%
|
|
| 7 | 1 |
0.5%
|
|
| 10 | 42 |
22%
|
|
| 15 | 6 |
3.1%
|
|
| 20 | 33 |
17.3%
|
|
| 25 | 15 |
7.9%
|
|
| 30 | 20 |
10.5%
|
|
| 33 | 1 |
0.5%
|
|
| 34 | 1 |
0.5%
|
|
| 35 | 4 |
2.1%
|
|
| 40 | 7 |
3.7%
|
|
| 45 | 1 |
0.5%
|
|
| 50 | 6 |
3.1%
|
|
| 60 | 1 |
0.5%
|
|
| 75 | 1 |
0.5%
|
|
| 80 | 2 |
1%
|
|
| Sysmiss | 154 |