| Value | Category | Cases | |
|---|---|---|---|
| 0 | Missing/Refused/NAD | 40276 |
99.1%
|
| 1 | Almost every month | 251 |
0.6%
|
| 2 | Some months not all | 89 |
0.2%
|
| 3 | Only once or twice | 41 |
0.1%
|
| 4 | None | 0 |
0%
|
| Sysmiss | 250051 |