ipl2
-3
|
filtered
de
|
| -2
|
don't know/invalid
de
|
| -1
|
refuse
de
|
| 1
|
Never
de
|
| 2
|
Rarely
de
|
| 3
|
Sometimes
de
|
| 4
|
Often
de
|
| 5
|
Always
de
|
