| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1171 |
58%
|
| 2 | Once a year | 116 |
5.7%
|
| 3 | Once a term | 346 |
17.1%
|
| 4 | Once a month | 260 |
12.9%
|
| 5 | Once a week | 54 |
2.7%
|
| 98 | Other | 71 |
3.5%
|
| Sysmiss | 1309 |