ipl9
-3
|
filtered
de
|
| -2
|
don't know/invalid
de
|
| -1
|
refuse
de
|
| 1
|
Very well
de
|
| 2
|
Well
de
|
| 3
|
Moderately well
de
|
| 4
|
Not well
de
|
| 5
|
Not well at all
de
|
