| Value | Category | Cases | |
|---|---|---|---|
| 1 | monthly | 65 |
36.5%
|
| 2 | quarterly | 50 |
28.1%
|
| 3 | once or twice a year | 27 |
15.2%
|
| 4 | whenever needed | 35 |
19.7%
|
| 5 | other | 1 |
0.6%
|
| Sysmiss | 3315 |