Value | Category | Cases | |
---|---|---|---|
1 | month | 0 |
0%
|
2 | year | 1 |
100%
|
77 | refused | 0 |
0%
|
88 | don't know | 0 |
0%
|
99 | missing | 0 |
0%
|
Sysmiss | 4969 |