| Value | Category | Cases | |
|---|---|---|---|
| -999 | NA | 8763 |
99.9%
|
| -99 | Don’t know | 0 |
0%
|
| 1 | 2 times a month or more | 1 |
0%
|
| 2 | Once a month | 4 |
0%
|
| 3 | Every 2 to 3 months | 0 |
0%
|
| 4 | Every 4 to 6 months | 0 |
0%
|
| 5 | About once a year | 0 |
0%
|
| 6 | Less than once a year | 0 |
0%
|
| Sysmiss | 3 |