| Value | Category | Cases | |
|---|---|---|---|
| 0 | 185 |
71.2%
|
|
| 4 | 1 |
0.4%
|
|
| 10 | 23 |
8.8%
|
|
| 15 | 4 |
1.5%
|
|
| 20 | 4 |
1.5%
|
|
| 30 | 38 |
14.6%
|
|
| 59 | 4 |
1.5%
|
|
| 77 | Don't know | 1 |
0.4%
|
| Sysmiss | 1127 |