| Value | Category |
|---|---|
| -99 | Refusal |
| -88 | Not provided |
| -77 | Not applicable |
| -66 | Dont know |
| -44 | |
| 1 | Answered all on his/her own |
| 2 | Answered most on his/her own |
| 3 | Answered from1/2 to ¾ on his/her own |
| 4 | Answered from ¼ to ½ on his/her own |
| 5 | Answered less than ¼ on his/her own |