| Value | Category | Cases | |
|---|---|---|---|
| 0 | Missing/Refused/NAD | 40172 |
98.8%
|
| 1 | Almost every month | 286 |
0.7%
|
| 2 | Some months not all | 111 |
0.3%
|
| 3 | Only once or twice | 88 |
0.2%
|
| 4 | None | 0 |
0%
|
| Sysmiss | 250051 |