| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1419 |
26.9%
|
| 1 | Once | 526 |
10%
|
| 2 | 2-4 times | 1479 |
28.1%
|
| 3 | 5-9 times | 590 |
11.2%
|
| 4 | About once a month on average | 553 |
10.5%
|
| 5 | About twice a month on average | 359 |
6.8%
|
| 6 | About once a week on average | 328 |
6.2%
|
| 7 | More than once a week | 15 |
0.3%
|
| Sysmiss | 48 |