prov_prev_t
-3
|
not applicable
de
|
| -2
|
don't know/invalid
de
|
| -1
|
Refuse
de
|
| 1
|
Less than 3 months
de
|
| 2
|
Less than 6 months
de
|
| 3
|
Less than 1 year
de
|
| 4
|
Less than 2 years
de
|
| 5
|
Less than 5 years
de
|
| 6
|
5 or more years
de
|
