ipl7_for
-3
|
filtered
de
|
| -2
|
don't know/invalid
de
|
| -1
|
refuse
de
|
| 1
|
Never
de
|
| 2
|
Once a year
de
|
| 3
|
Once a month
de
|
| 4
|
Once a week
de
|
| 5
|
Almost everyday
de
|
