| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 35 |
16.1%
|
| 1 | less than 20% | 50 |
22.9%
|
| 2 | 20-50% | 62 |
28.4%
|
| 3 | more than 50% | 61 |
28%
|
| 4 | don't know | 10 |
4.6%
|
| Sysmiss | 11897 |