| Value | Category | Cases | |
|---|---|---|---|
| 1 | formal | 28 |
63.6%
|
| 2 | informal | 16 |
36.4%
|
| 77 | refuse | 0 |
0%
|
| 88 | didn't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 4926 |